一元一次方程30道题
一元一次方程30道题含答案
3z- 2.5 1-3J_ 0.6x-1 23、丨「j ":10x-3 4x+l 1--------------- =12 5»+l_9y+l11、f' I J5-3x_3-5x12、 1 ":0.02^ —0.18^ + 0.18 1.5------ +U --------------------------------- 13、:14、2|X-1|=4x-1 x +2 4-x3_4"1)—x-——8324、4[<2 4丿-2.25、3 -(200 + x)—2(300 -x)= 300 江210 10 253x-2 9-2x x-1263 4 2x- 2 2x-5x- -------- = --------27、(1) 匚JJi 一1、8、0.4 0.53J-13 4 1 1、小3 ’[(x ) -8] x 14 3 2 4 2x -3 4x 1 ,150 lx+ 0.1 ] 2-3x---------- -I = ---------02 32x+l 1 3x-2x ----------- -- 1 ------------12 40.lx- 0.2 x+1 --------------------- =316、：.：! 工-------- 二----------- [a ^b^O)17、订L1'—+—J=0 518、心二x-42 _ x------------------------ -- ---19、_ -.20、y上=1上12 4r-1 & x+2r- ------- = 2 - -------21、_ 一.0.02x . 0 18x + 018 1 53x - +1=------22、Ix-3 x +4 1--------------- - 1.60.5 0215、 6 228、求下列各式中x的值：4 1 1 1一：一=畫订5 4.8x+-x-15 x.- + 7=103(1) 1」1 (2) 「(3) }1.8-8J L3-3z 5z - 0.4 n29、一 ] [ 二；30、解关于x的方程b (a+ x)—a=( 2b+1) x+ ab (a*0).参考答案一、计算题1、x=—35x—15 lOx+20 n -2、解：[ ...................... 2 分x=8 .............. ............ 4分32^-5)/+5 = 10 — 2^—42y -5y-\-2y = 10-5-4-y = 1y 二 T1 1 3—X—) £二 F X+12 4 。
解一元一次方程50道练习题
解一元一次方程50道练习题解一元一次方程50道练题（含答案）1.2x+1=115/(x+4)2.8x-0.1=0.5x-0.73.x-4=x+3-x4.(2x^2-12x+3)/(x^2+13x+17)=1/235.5x+2=7x-86.(2x-1)/3 - (4x-1)/2 + (3x-2)/2 + 1 = -x+27.2[1-(x+1)] = (2x-3)8.(2x+3)+(2x+4) = (2x+5)+(2x+6)9.x = -510.(2x-1)/2 - 3(4x-1)/4 + 2(3x-2)/2 + 1 = -x+211.x = 1/312.y = 1/213.x = -1/314.(2x-1)^2/3 - x + 2 = 015.x = (2/3)16.(x-9)/2 = x+117.x = -1/3 or x = 3/718.XXX19.x = 220.x = -221.x = 2/322.x = 5/823.XXX24.x = -1/225.x = -2/326.x = 327.x = -928.x = -129.XXX30.x = 831.x = -1/232.XXX33.y = -2/534.y = 4/10 or y = 2/735.x = -1/6这里提供了50个一元一次方程的练题及其答案。
每个方程都需要求解，有些需要化简，有些需要代数运算，有些需要解方程组。
通过练这些题目，可以提高解方程的能力。
8x - 4 + 2x = 4x - 3XXX XXX:10x - 4 = 4x - 3Subtract 4x from both sides:6x - 4 = -3Add 4 to both sides:6x = 1Divide both sides by 6:x = 1/638) 2(3x + 4) = 6 - 5(x - 7) Distribute the 2 on the left side: 6x + 8 = 6 - 5x + 35 Combine like XXX:11x + 8 = 41Subtract 8 from both sides:11x = 33Divide both sides by 11:x = 339) x^2 - 5x + 12 = -1/236Add 1/236 to both sides:x^2 - 5x + 12 + 1/236 = 0 Find a common XXX:x^2 - 5x + (12*236+1)/236 = 0 XXX:x^2 - 5x + 2833/236 = 040) x - [x - (x-2)] = 2XXX inside the brackets:x - [x - x + 2] = 2XXX:x - 2 = 2Add 2 to both sides:x = 441) -2.5 = -3.5This n is not solvable because it is not true.42) -(x-5) + 3/(2x-3) = 5/3Distribute the negative:x + 5 + 3/(2x-3) = 5/3Subtract 5 from both sides:x + 3/(2x-3) = -10/3Multiply both sides by 3(2x-3):3x(2x-3) + 9 = -10(2x-3)Distribute the -3x:6x^2 + 9x + 9 = -20x + 30Add 20x to both sides:6x^2 + 29x + 9 = 30Subtract 30 from both sides:6x^2 + 29x - 21 = 0Use the XXX x:x = (-(29) ± sqrt((29)^2 - 4(-6)(-21))) / (2(-6))x = (-(29) ± sqrt(929)) / (-12)x = (29 ± sqrt(929)) / 1243) 4x - 1.55x - 0.81 / (1.2 - x) = 0.5 / (0.2 + 0.1) + 3.4y + 0.9y - 5.3 - 2y / 0.3XXX:4x - 1.55x - 0.81 / (1.2 - x) = 5.3 + 2.3y - 2y / 0.3Combine like XXX:2.45x - 0.81 / (1.2 - x) = 5.3 + 0.3yMultiply both sides by (1.2 - x):2.45x(1.2 - x) - 0.81 = (5.3 + 0.3y)(1.2 - x)Distribute the right side:2.45x(1.2 - x) - 0.81 = 6.36 - 5.08x + 0.36y Simplify and move all terms to one side: 2.94x^2 - 4.67x + 7.17 - 0.36y = 0This XXX for x or y without nal n.44) x - 1 / (x+2/3) = 6/3XXX (x+2/3):x(x+2/3) - 1 = 2Distribute the x:x^2 + 2/3x - 1 = 2Add 1 to both sides:x^2 + 2/3x = 3Multiply both sides by 3:3x^2 + 2x = 9Subtract 9 from both sides:3x^2 + 2x - 9 = 0Use the XXX x:x = (-2 ± sqrt(2^2 - 4(3)(-9))) / (2(3)) x = (-2 ± sqrt(100)) / 6x = (-2 ± 10) / 6x = 1 or x = -3/245) This n is not provided.46) 3(x+2) - 11/3(2x-3) = 2(2x-3) - 2(x+2) Distribute the 11/3 on the left side:3(x+2) - 11x/3 + 11 = 2(2x-3) - 2(x+2) Distribute the 2 on the right side:3(x+2) - 11x/3 + 11 = 4x - 6 - 2x - 4 Simplify the left side:3x + 6 - 11x/3 + 11 = 2x - 10Combine like XXX:3x - 11x/3 + 17 = 2x - 10 Multiply both sides by 3:9x - 11x + 51 = 6x - 30 Subtract 6x from both sides: 3x + 51 = -30Subtract 51 from both sides: 3x = -81Divide both sides by 3:x = -2747) This n is not provided.48) 5(y+8) - 5 = 4(2y-7) Distribute the 5 on the left side: 5y + 40 - 5 = 8y - 28 Combine like XXX:5y + 35 = 8y - 28Subtract XXX:35 = 3y - 28Add 28 to both sides:63 = 3yDivide both sides by 3:y = 2149) 233 - x^2 - 3x / (x-2) = 6XXX (x-2):233(x-2) - x^2(x-2) - 3x(x-2) = 6(x-2) Distribute the XXX:233x - 466 - x^3 + 2x^2 - 3x^2 + 6x = 6x - 12 Simplify:x^3 - x^2 + 236x - 454 = 0Use XXX to find a root:2 | -1 -1 236 -4542 2 4761 1 238 22The root is x = 2.Factor the quadratic:x-2)(x^2 + x - 476) = 0Use the XXX:x = (-1 ± sqrt(1^2 - 4(-476))) / 2x = (-1 ± sqrt(1905)) / 2x = 19.4 or x = -20.450) 1.8 - 8x / (1.3 - x^2) = 5x - 0.4 / (0.3 - x^2) Multiply both sides by (1.3 - x^2)(0.3 - x^2):1.8(1.3 - x^2)(0.3 - x^2) - 8x(0.3 - x^2) = (1.3 - x^2)(0.3 - x^2)(5x - 0.4)XXX and simplify:2.34x^4 + 0.9x^2 + 5.76x - 5.04 = 0This XXX for x without the use of numerical methods.。
100道一元一次方程计算题
100道一元一次方程计算题1、2(x-1)=42、(x-1)-1=13、1-3(8-x)=-2(15-2x)4、(x+1)/2+(x-4)/3=255,(1/5)x-(1/2)(3-2x)=166、x=107、8x+5=38、x=-19、-5x+5=1810、-5x-3x+3=1311、-10y-9=9-2y12、2x-6=013、-3x/5+4/5=x/7-3/514、x/3+2=2x-315、(3-x)/2-3=1/1616、x=5/217、-10x^2+56x-7=-318、(3x-11)/2=4x/5-319、(2/3)(11/4-x)-3=-520、(4/(5(x-1))-6)+4=121、(x+1)/(x-2)-3/(x+6)=6/(x^2-1)22、0.1x-0.2=0.5/(x+1)=323、(x+4)/(x-3)=-1.624、6x-10=825、8-x=226、5-3x=8x+1827、33x-7=528、6x-10=829、x=630、5/2x=231、x=332、12x-4=833、8x-3=134、2x-4=x-135、3+4x=1136、15x=16037、28-7x=9x-3638、x=1139、2x=240、x=1000/641、x=142、x=1043、x=444、5x=3545) 解方程5X-18=3-2X。
移项得7X=21，因此X=3.46) 解方程(7X-4)+3(X-2)=2X+6.化简得10X-10=2X+10，因此X=2.47) 解方程80÷X=20.移项得X=4.48) 解方程12X+8X-12=28.化简得20X=40，因此X=2.49) 解方程3(2X-1)+10=37.化简得6X+7=37，因此X=5.50) 解方程1.6X+3.4X-X-5=27.化简得3X=33，因此X=11.51) 解方程2(3X-4)+(4-X)=4X。
化简得5X-4=4X，因此X=4.52) 解方程3(X+2)÷5=X+2.移项得2X=8，因此X=4.53) 解方程(3X+5)÷2=(5X-9)÷3.化简得9X+15=10X-18，因此X=-33.55) 解方程2X+23=0.移项得2X=-23，因此X=-11.5.56) 解方程70%X+20%X=3.6.化简得90%X=3.6，因此X=4.57) 解方程X×31/5=55/20×4.化简得X=8.58) 解方程25%+10X=4/5.化简得10X=1/5，因此X=1/50.59) 解方程X-15%X=68.化简得0.85X=68，因此X=80.60) 解方程X+3/8X=121.化简得11/8X=121，因此X=88.61) 解方程5X-3×5521/21=7.化简得5X=166，因此X=33.2.62) 解方程3X/4=12/4.化简得X=4.64) 解方程3/4X+1/4=3/8.化简得3/4X=1/8，因此X=1/6.65) 解方程3X=3/8.化简得X=1/8.66) 解方程X/27/7=16.化简得X=3024.67) 解方程X+7/8X=3/4.化简得15/8X=3/4，因此X=0.5.68) 解方程4X-6×2/3=2.化简得4X=6，因此X=1.5.69) 解方程12/X=3/5/10.化简得X=40.70) 解方程3/5X=25/72.化简得X=100/3.73) 解方程4X-3×9=29.化简得4X=56，因此X=14.74) 解方程1/2X+1/6X=4.化简得2/3X=4，因此X=6.76) 解方程X+1/4X=20.化简得5/4X=20，因此X=16.78) 解方程2(X-2.6)=8.化简得X=5.4.79) 解方程6X+5=13.4.化简得6X=8.4，因此X=1.4.80) 解方程213/5X-3X=10.化简得X=50.81) 解方程4X-6=38.化简得4X=44，因此X=11.82) 解方程5X=15/19.化简得X=3.83) 解方程8/21X=4/15.化简得X=28/5.84) 解方程X/4/5=15/28. 化简得X=75/2.85) 解方程2/3X/1/4=12. 化简得X=24.86) 解方程325/5X=72.化简得X=14.04.87) 解方程8116/9X=6×51. 化简得X=378.88) 解方程X//35=45/25. 化简得X=135.89) 解方程X-0.25=1/4.化简得X=1/2.90) 解方程X/4=30%。
一元一次方程100道及答案过程
一元一次方程100道及答案过程本文精心收集了100道一元一次方程题，且每道题均附上清晰的求解步骤和解答，可供学生们在学习中参考。
一元一次方程是高中一类重要的数学问题，在数学测试中出现的频率也比较高。
下面是一元一次方程100道及解答过程：1. x + 2 = 5解答：x = 32. 2x = 4解答：x = 23. x - 3 = 4解答：x = 74. 4x - 5 = 15解答：x = 45. x - 7 = 3解答：x = 106. 5x + 6 = 36 解答：x = 67. 3x = 9解答：x = 38. 7x - 2 = 12 解答：x = 29. 9x - 4 = 16 解答：x = 210. 6x + 3 = 27 解答：x = 411. 4x + 9 = 25 解答：x = 412. 2x - 7 = -5 解答：x = 413. 2x = 10解答：x = 514. 3x - 4 = 6 解答：x = 415. 8x - 3 = 21 解答：x = 316. x = 8解答：x = 817. 5x + 2 = 27 解答：x = 518. 3x - 7 = 6 解答：x = 519. 8x + 4 = 48 解答：x = 620. 4x - 3 = 7 解答：x = 221. x + 5 = 10 解答：x = 522. 2x = 6解答：x = 323. 8x + 9 = 61 解答：x = 724. 4x + 5 = 21 解答：x = 425. x - 4 = 3 解答：x = 726. 7x + 2 = 20 解答：x = 327. 9x = 27 解答：x = 328. 7x - 4 = 10 解答：x = 229. 9x + 7 = 58 解答：x = 630. 3x - 8 = 14 解答：x = 631. 5x + 9 = 44 解答：x = 732. x = 5解答：x = 533. 6x - 8 = 18 解答：x = 434. 8x + 1 = 65 解答：x = 835. 4x - 7 = 11 解答：x = 336. 5x + 3 = 28解答：x = 537. 2x + 7 = 17 解答：x = 538. 8x - 5 = 47 解答：x = 639. 9x - 1 = 80 解答：x = 940. 7x - 3 = 26 解答：x = 441. 4x + 8 = 28 解答：x = 542. 6x + 9 = 51 解答：x = 743. x + 6 = 9 解答：x = 344. 5x = 10解答：x = 245. 9x - 8 = 28 解答：x = 446. x = 12解答：x = 1247. 8x - 6 = 36 解答：x = 548. 5x + 4 = 24 解答：x = 449. x - 5 = 8 解答：x = 1350. 6x + 2 = 42 解答：x = 751. 2x + 9 = 23 解答：x = 752. 3x - 7 = 12 解答：x = 753. 5x + 6 = 30 解答：x = 554. x = 18解答：x = 1855. 7x + 4 = 46 解答：x = 656. 4x + 3 = 19 解答：x = 457. 8x = 64解答：x = 858. 6x - 5 = 21 解答：x = 459. 3x + 8 = 14解答：x = 260. x - 6 = 11 解答：x = 1761. 7x - 9 = 32 解答：x = 562. 2x + 7 = 17 解答：x = 563. 6x + 4 = 38 解答：x = 664. 5x = 30解答：x = 665. 3x + 5 = 20 解答：x = 566. x + 9 = 16 解答：x = 767. 8x - 7 = 21 解答：x = 368. x = 20解答：x = 2069. 4x + 3 = 19 解答：x = 470. 7x - 5 = 25 解答：x = 471. x - 9 = 5 解答：x = 1472. 2x + 8 = 14 解答：x = 373. 8x + 4 = 68 解答：x = 874. 6x - 7 = 11 解答：x = 375. 3x + 9 = 24 解答：x = 576. 5x - 8 = 33 解答：x = 777. x + 4 = 10 解答：x = 678. 7x + 2 = 64 解答：x = 979. 9x - 5 = 44 解答：x = 580. 4x + 8 = 28 解答：x = 581. 3x + 2 = 5 解答：x = 182. x - 8 = 10解答：x = 1883. 5x = 40解答：x = 884. 7x + 6 = 74 解答：x = 1085. 9x = 63解答：x = 786. x = 24解答：x = 2487. 4x + 1 = 17 解答：x = 488. 2x - 6 = 8 解答：x = 789. 7x - 9 = 16 解答：x = 390. 5x + 7 = 47 解答：x = 891. 3x - 7 = 4 解答：x = 792. 8x + 9 = 73 解答：x = 993. x - 4 = 9 解答：x = 1394. 6x = 48解答：x = 895. 4x + 6 = 22 解答：x = 496. x + 8 = 13 解答：x = 597. 7x + 5 = 43 解答：x = 698. 9x - 3 = 36 解答：x = 499. 3x + 6 = 24 解答：x = 6100. x - 9 = 16 解答：x = 25。
一元一次方程式每日常规题大全(含答案)
班级姓名成绩一、单边未知数(1)24+3x = 87 (2)20x-8 = 252 (3)19x-9 = 162 (4)37 = 27x-17 (5)127 = 16x-1 (6)89 = 13x-2 (7)4+29x = 729 (8)10x-2 = 68(9)23x-11 = 403 (10)254 = 21x-19 (11)4x-23 = 37 (12)451 = 16x-13 (13)61 = 7x-23 (14)413 = 29x-22 (15)20x-19 = 101 (16)22x-22 = 484 (17)30+26x = 160 (18)23+7x = 58 (19)207 = 20x-13 (20)21x-14 = 91(21)171 = 6x-3 (22)22x-9 = 343 (23)10x-20 = 280 (24)1+21x = 295二、双边未知数(1)6+23x = 306-2x (2)3-2x = 8x-67 (3)6x-26 = 139-5x (4)28x-20 = 228-3x (5)24+19x = 444-2x (6)25x-9 = 368-4x (7)10+11x = 226+2x (8)4x-20 = 10x-86 (9)11+22x = 627-6x (10)30x-17 = 487+2x (11)4x-4 = 5x-17 (12)3x-22 = 30-x (13)7+21x = 406+2x (14)12x-26 = 46+3x (15)25+23x = 805-7x (16)13x-3 = 97-7x (17)26x-29 = 385+3x (18)20+19x = 295-6x (19)23-8x = 11-5x (20)16x-25 = 150-9x (21)14x-12 = 261-7x (22)20x-14 = 86-5x (23)3x-2 = 7x-46 (24)9-28x = 10x-599班级姓名成绩一、单边未知数(1)27x-14 = 580 (2)17+18x = 323 (3)7+25x = 332 (4)9x-26 = 118 (5)x-14 = 8 (6)344 = 29x-4 (7)44 = 12x-28 (8)8x-24 = 120 (9)42 = 3x-9 (10)14 = 6x-10 (11)156 = 16+14x (12)37 = 9+28x (13)5x-7 = 78 (14)91 = 16+3x (15)13x-16 = 205 (16)20x-3 = 97 (17)20x-5 = 295 (18)387 = 24x-21 (19)810 = 29x-2 (20)16+12x = 328(21)19x-30 = 141 (22)60 = 4+7x (23)11x-17 = 225 (24)21x-21 = 609二、双边未知数(1)30+14x = 165+5x (2)25x-11 = 308-4x (3)14x-1 = 376+x (4)6x-21 = 369-7x (5)8-25x = 3x-300 (6)5x-4 = 5+2x (7)23+5x = 59+3x (8)4x-19 = 121-3x (9)8+4x = 123-x (10)8+15x = 25-2x (11)23-22x = 2x-577 (12)27x-26 = 870-5x (13)5x-14 = 4x-1 (14)20x-19 = 137+7x (15)24x-23 = 760-5x (16)2x-24 = 6-x (17)6-2x = 3x-34 (18)12x-8 = 292-8x (19)17x-18 = 99+4x (20)26+11x = 302-x (21)29x-14 = 394+5x (22)20x-14 = 239-3x (23)23-5x = 3x-121 (24)25x-22 = 818-3x班级姓名成绩一、单边未知数(1)345 = 15x-30 (2)75 = 3x-15 (3)29+28x = 645 (4)19+17x = 121 (5)23+x = 35 (6)21x-20 = 526 (7)3x-30 = 42 (8)399 = 22+29x (9)42 = 2x-18 (10)77 = 5x-23 (11)30x-16 = 14 (12)26x-1 = 233 (13)41 = 10x-9 (14)404 = 27+29x (15)7x-16 = 166 (16)28x-27 = 729 (17)8x-25 = 63 (18)25x-9 = 41 (19)5 = 17-12x (20)3x-26 = 37(21)215 = 20x-5 (22)27x-28 = 674 (23)29x-14 = 856 (24)117 = 28x-23二、双边未知数(1)8-5x = 4x-181 (2)27x-4 = 216+7x (3)24x-9 = 83+x (4)30+17x = 184-5x (5)27x-20 = 790-3x (6)30+23x = 69+10x (7)14+26x = 846-6x (8)24+2x = 220-5x (9)22-25x = 8x-176 (10)17x-14 = 216+7x (11)29x-3 = 129+7x (12)6x-27 = 7x-43 (13)27x-26 = 464-8x (14)25x-27 = 1-3x (15)13x-15 = 363-5x (16)24+6x = 297-7x (17)6-2x = 10x-258 (18)27x-10 = 715-2x (19)2-6x = 56-9x (20)17x-28 = 644-7x (21)12x-9 = 152+5x (22)25-27x = 8x-815 (23)8x-11 = 9x-18 (24)10x-18 = 225+x班级姓名成绩一、单边未知数(1)48 = 15x-12 (2)13x-23 = 185 (3)9 = 29-4x (4)12x-29 = 331 (5)27x-7 = 371 (6)15x-19 = 281 (7)22+9x = 193 (8)29x-12 = 481 (9)14+21x = 98 (10)1+20x = 421 (11)251 = 21x-1 (12)234 = 9+15x (13)204 = 13x-4 (14)366 = 30+14x (15)136 = 11x-7 (16)13x-2 = 167 (17)497 = 24x-7 (18)152 = 24x-16 (19)25x-24 = 576 (20)514 = 21x-11(21)12 = x-9 (22)65 = 10x-5 (23)14x-16 = 96 (24)391 = 21x-29二、双边未知数(1)6-21x = 4x-594 (2)17x-27 = 61-5x (3)29x-21 = 793-8x (4)20-22x = 4x-6 (5)21x-21 = 384+6x (6)15x-16 = 64+7x (7)9+18x = 425+2x (8)7x-24 = 8x-36 (9)25-7x = 22-6x (10)2+12x = 98-4x (11)12x-20 = 253-x (12)15x-18 = 157+8x (13)23x-4 = 428-x (14)2x-20 = 28-x (15)24x-1 = 124-x (16)21x-19 = 53-3x (17)9+8x = 329-8x (18)24+21x = 64+x (19)17+7x = 131+x (20)21-2x = 261-10x (21)27x-3 = 105+9x (22)23x-11 = 346+6x (23)2+13x = 158+x (24)19+28x = 298-3x班级姓名成绩一、单边未知数(1)58 = 3x-20 (2)28x-10 = 102 (3)6+22x = 182 (4)513 = 30x-27 (5)474 = 19x-1 (6)18+2x = 50 (7)247 = 10x-13 (8)14+19x = 109 (9)28+23x = 235 (10)15x-7 = 8 (11)26-x = 18 (12)10x-4 = 156 (13)27x-27 = 783 (14)309 = 24x-27 (15)18x-26 = 442 (16)145 = 10x-25 (17)275 = 10x-5 (18)491 = 20x-9 (19)147 = 15x-3 (20)33 = 29+2x(21)15+14x = 197 (22)7x-22 = 62 (23)26x-10 = 198 (24)511 = 27x-2二、双边未知数(1)8x-19 = 201-3x (2)25x-16 = 368+x (3)20+24x = 68+8x (4)18+x = 8x-17 (5)4-7x = 2x-212 (6)11x-25 = 281-7x (7)28-12x = 2x-350 (8)14x-22 = 83-x (9)14x-24 = 246+4x (10)20x-13 = 567-9x (11)10+14x = 442-2x (12)8+20x = 138+10x (13)30+5x = 38-3x (14)23+25x = 223+5x (15)23x-3 = 374-6x (16)2x-23 = 6x-63 (17)16x-8 = 102+6x (18)16x-10 = 122+5x (19)22+24x = 126-2x (20)15+16x = 41-10x (21)18x-7 = 74-9x (22)11x-26 = 263-6x (23)7-5x = 16-8x (24)17x-15 = 42-2x小学数学一元一次方程每日训练(1)答案一、单边未知数(1)58 = 3x-20 (2)28x-10 = 102解析：将-20移到方程式左边,变成20 解析：将-10移到方程式右边,变成10 58+20 = 3x 28x = 102+1078 = 3x 28x = 112两边交换得3x = 78 x = 4x = 26(3)6+22x = 182 (4)513 = 30x-27解析：将6移到方程式右边,变成-6 解析：将-27移到方程式左边,变成27 22x = 182-6 513+27 = 30x22x = 176 540 = 30xx = 8 两边交换得30x = 540x = 18(5)474 = 19x-1 (6)18+2x = 50解析：将-1移到方程式左边,变成1 解析：将18移到方程式右边,变成-18 474+1 = 19x 2x = 50-18475 = 19x 2x = 32两边交换得19x = 475 x = 16x = 25(7)247 = 10x-13 (8)14+19x = 109解析：将-13移到方程式左边,变成13 解析：将14移到方程式右边,变成-14 247+13 = 10x 19x = 109-14260 = 10x 19x = 95两边交换得10x = 260 x = 5x = 26(9)28+23x = 235 (10)15x-7 = 8解析：将28移到方程式右边,变成-28 解析：将-7移到方程式右边,变成7 23x = 235-28 15x = 8+723x = 207 15x = 15x = 9 x = 1(11)26-x = 18 (12)10x-4 = 156解析：将-x移到方程式右边,变成x 解析：将-4移到方程式右边,变成4 将18移到方程式左边,变成-18 10x = 156+426-18 = +x 10x = 1608 = x x = 16两边交换得x = 8(13)27x-27 = 783 (14)309 = 24x-27解析：将-27移到方程式右边,变成27 解析：将-27移到方程式左边,变成27 27x = 783+27 309+27 = 24x27x = 810 336 = 24xx = 30 两边交换得24x = 336x = 14(15)18x-26 = 442 (16)145 = 10x-25解析：将-26移到方程式右边,变成26 解析：将-25移到方程式左边,变成25 18x = 442+26 145+25 = 10x18x = 468 170 = 10xx = 26 两边交换得10x = 170x = 17(17)275 = 10x-5 (18)491 = 20x-9解析：将-5移到方程式左边,变成5 解析：将-9移到方程式左边,变成9 275+5 = 10x 491+9 = 20x280 = 10x 500 = 20x两边交换得10x = 280 两边交换得20x = 500x = 28 x = 25(19)147 = 15x-3 (20)33 = 29+2x解析：将-3移到方程式左边,变成3 解析：将29移到方程式左边,变成-29 147+3 = 15x 33-29 = 2x150 = 15x 4 = 2x两边交换得15x = 150 两边交换得2x = 4x = 10 x = 2(21)15+14x = 197 (22)7x-22 = 62解析：将15移到方程式右边,变成-15 解析：将-22移到方程式右边,变成22 14x = 197-15 7x = 62+2214x = 182 7x = 84x = 13 x = 12(23)26x-10 = 198 (24)511 = 27x-2解析：将-10移到方程式右边,变成10 解析：将-2移到方程式左边,变成2 26x = 198+10 511+2 = 27x26x = 208 513 = 27xx = 8 两边交换得27x = 513x = 19二、双边未知数(1)8x-19 = 201-3x (2)25x-16 = 368+x解析：将-3x移到方程式左边,变成3x 解析：将1x移到方程式左边,变成-x将-19移到方程式右边,变成19 将-16移到方程式右边,变成163x+8x = 201+19 25x-x = 368+1611x = 220 24x = 384x = 20 x = 16(3)20+24x = 68+8x (4)18+x = 8x-17解析：将8x移到方程式左边,变成-8x 解析：将1x移到方程式右边,变成-x将20移到方程式右边,变成-20 将-17移到方程式左边,变成1724x-8x = 68-20 17+18 = 8x-x16x = 48 35 = 7xx = 3 两边交换得x = 5(5)4-7x = 2x-212 (6)11x-25 = 281-7x解析：将-7x移到方程式右边,变成7x 解析：将-7x移到方程式左边,变成7x 将-212移到方程式左边,变成212 将-25移到方程式右边,变成25212+4 = 2x+7x 7x+11x = 281+25216 = 9x 18x = 306两边交换得x = 24 x = 17(7)28-12x = 2x-350 (8)14x-22 = 83-x解析：将-12x移到方程式右边,变成12x 解析：将-x移到方程式左边,变成1x将-350移到方程式左边,变成350 将-22移到方程式右边,变成22350+28 = 2x+12x 1x+14x = 83+22378 = 14x 15x = 105两边交换得x = 27 x = 7(9)14x-24 = 246+4x (10)20x-13 = 567-9x解析：将4x移到方程式左边,变成-4x 解析：将-9x移到方程式左边,变成9x 将-24移到方程式右边,变成24 将-13移到方程式右边,变成1314x-4x = 246+24 9x+20x = 567+1310x = 270 29x = 580x = 27 x = 20(11)10+14x = 442-2x (12)8+20x = 138+10x解析：将-2x移到方程式左边,变成2x 解析：将10x移到方程式左边,变成-10x 将10移到方程式右边,变成-10 将8移到方程式右边,变成-82x+14x = 442-10 20x-10x = 138-816x = 432 10x = 130x = 27 x = 13(13)30+5x = 38-3x (14)23+25x = 223+5x解析：将-3x移到方程式左边,变成3x 解析：将5x移到方程式左边,变成-5x将30移到方程式右边,变成-30 将23移到方程式右边,变成-233x+5x = 38-30 25x-5x = 223-238x = 8 20x = 200x = 1 x = 10(15)23x-3 = 374-6x (16)2x-23 = 6x-63解析：将-6x移到方程式左边,变成6x 解析：将2x移到方程式右边,变成-2x 将-3移到方程式右边,变成3 将-63移到方程式左边,变成636x+23x = 374+3 63-23 = 6x-2x29x = 377 40 = 4xx = 13 两边交换得x = 10(17)16x-8 = 102+6x (18)16x-10 = 122+5x解析：将6x移到方程式左边,变成-6x 解析：将5x移到方程式左边,变成-5x 将-8移到方程式右边,变成8 将-10移到方程式右边,变成1016x-6x = 102+8 16x-5x = 122+1010x = 110 11x = 132x = 11 x = 12(19)22+24x = 126-2x (20)15+16x = 41-10x解析：将-2x移到方程式左边,变成2x 解析：将-10x移到方程式左边,变成10x 将22移到方程式右边,变成-22 将15移到方程式右边,变成-152x+24x = 126-22 10x+16x = 41-1526x = 104 26x = 26x = 4 x = 1(21)18x-7 = 74-9x (22)11x-26 = 263-6x解析：将-9x移到方程式左边,变成9x 解析：将-6x移到方程式左边,变成6x 将-7移到方程式右边,变成7 将-26移到方程式右边,变成269x+18x = 74+7 6x+11x = 263+2627x = 81 17x = 289x = 3 x = 17(23)7-5x = 16-8x (24)17x-15 = 42-2x解析：将-8x移到方程式左边,变成8x 解析：将-2x移到方程式左边,变成2x 将7移到方程式右边,变成-7 将-15移到方程式右边,变成158x-5x = 16-7 2x+17x = 42+153x = 9 19x = 57x = 3 x = 3小学数学一元一次方程每日训练(2)答案一、单边未知数(1)58 = 3x-20 (2)28x-10 = 102解析：将-20移到方程式左边,变成20 解析：将-10移到方程式右边,变成10 58+20 = 3x 28x = 102+1078 = 3x 28x = 112两边交换得3x = 78 x = 4x = 26(3)6+22x = 182 (4)513 = 30x-27解析：将6移到方程式右边,变成-6 解析：将-27移到方程式左边,变成27 22x = 182-6 513+27 = 30x22x = 176 540 = 30xx = 8 两边交换得30x = 540x = 18(5)474 = 19x-1 (6)18+2x = 50解析：将-1移到方程式左边,变成1 解析：将18移到方程式右边,变成-18 474+1 = 19x 2x = 50-18475 = 19x 2x = 32两边交换得19x = 475 x = 16x = 25(7)247 = 10x-13 (8)14+19x = 109解析：将-13移到方程式左边,变成13 解析：将14移到方程式右边,变成-14 247+13 = 10x 19x = 109-14260 = 10x 19x = 95两边交换得10x = 260 x = 5x = 26(9)28+23x = 235 (10)15x-7 = 8解析：将28移到方程式右边,变成-28 解析：将-7移到方程式右边,变成7 23x = 235-28 15x = 8+723x = 207 15x = 15x = 9 x = 1(11)26-x = 18 (12)10x-4 = 156解析：将-x移到方程式右边,变成x 解析：将-4移到方程式右边,变成4 将18移到方程式左边,变成-18 10x = 156+426-18 = +x 10x = 1608 = x x = 16两边交换得x = 8(13)27x-27 = 783 (14)309 = 24x-27解析：将-27移到方程式右边,变成27 解析：将-27移到方程式左边,变成27 27x = 783+27 309+27 = 24x27x = 810 336 = 24xx = 30 两边交换得24x = 336x = 14(15)18x-26 = 442 (16)145 = 10x-25解析：将-26移到方程式右边,变成26 解析：将-25移到方程式左边,变成25 18x = 442+26 145+25 = 10x18x = 468 170 = 10xx = 26 两边交换得10x = 170x = 17(17)275 = 10x-5 (18)491 = 20x-9解析：将-5移到方程式左边,变成5 解析：将-9移到方程式左边,变成9 275+5 = 10x 491+9 = 20x280 = 10x 500 = 20x两边交换得10x = 280 两边交换得20x = 500x = 28 x = 25(19)147 = 15x-3 (20)33 = 29+2x解析：将-3移到方程式左边,变成3 解析：将29移到方程式左边,变成-29 147+3 = 15x 33-29 = 2x150 = 15x 4 = 2x两边交换得15x = 150 两边交换得2x = 4x = 10 x = 2(21)15+14x = 197 (22)7x-22 = 62解析：将15移到方程式右边,变成-15 解析：将-22移到方程式右边,变成22 14x = 197-15 7x = 62+2214x = 182 7x = 84x = 13 x = 12(23)26x-10 = 198 (24)511 = 27x-2解析：将-10移到方程式右边,变成10 解析：将-2移到方程式左边,变成2 26x = 198+10 511+2 = 27x26x = 208 513 = 27xx = 8 两边交换得27x = 513x = 19二、双边未知数(1)8x-19 = 201-3x (2)25x-16 = 368+x解析：将-3x移到方程式左边,变成3x 解析：将1x移到方程式左边,变成-x将-19移到方程式右边,变成19 将-16移到方程式右边,变成163x+8x = 201+19 25x-x = 368+1611x = 220 24x = 384x = 20 x = 16(3)20+24x = 68+8x (4)18+x = 8x-17解析：将8x移到方程式左边,变成-8x 解析：将1x移到方程式右边,变成-x将20移到方程式右边,变成-20 将-17移到方程式左边,变成1724x-8x = 68-20 17+18 = 8x-x16x = 48 35 = 7xx = 3 两边交换得x = 5(5)4-7x = 2x-212 (6)11x-25 = 281-7x解析：将-7x移到方程式右边,变成7x 解析：将-7x移到方程式左边,变成7x 将-212移到方程式左边,变成212 将-25移到方程式右边,变成25212+4 = 2x+7x 7x+11x = 281+25216 = 9x 18x = 306两边交换得x = 24 x = 17(7)28-12x = 2x-350 (8)14x-22 = 83-x解析：将-12x移到方程式右边,变成12x 解析：将-x移到方程式左边,变成1x将-350移到方程式左边,变成350 将-22移到方程式右边,变成22350+28 = 2x+12x 1x+14x = 83+22378 = 14x 15x = 105两边交换得x = 27 x = 7(9)14x-24 = 246+4x (10)20x-13 = 567-9x解析：将4x移到方程式左边,变成-4x 解析：将-9x移到方程式左边,变成9x 将-24移到方程式右边,变成24 将-13移到方程式右边,变成1314x-4x = 246+24 9x+20x = 567+1310x = 270 29x = 580x = 27 x = 20(11)10+14x = 442-2x (12)8+20x = 138+10x解析：将-2x移到方程式左边,变成2x 解析：将10x移到方程式左边,变成-10x 将10移到方程式右边,变成-10 将8移到方程式右边,变成-82x+14x = 442-10 20x-10x = 138-816x = 432 10x = 130x = 27 x = 13(13)30+5x = 38-3x (14)23+25x = 223+5x解析：将-3x移到方程式左边,变成3x 解析：将5x移到方程式左边,变成-5x 将30移到方程式右边,变成-30 将23移到方程式右边,变成-233x+5x = 38-30 25x-5x = 223-238x = 8 20x = 200x = 1 x = 10(15)23x-3 = 374-6x (16)2x-23 = 6x-63解析：将-6x移到方程式左边,变成6x 解析：将2x移到方程式右边,变成-2x 将-3移到方程式右边,变成3 将-63移到方程式左边,变成636x+23x = 374+3 63-23 = 6x-2x29x = 377 40 = 4xx = 13 两边交换得x = 10(17)16x-8 = 102+6x (18)16x-10 = 122+5x解析：将6x移到方程式左边,变成-6x 解析：将5x移到方程式左边,变成-5x 将-8移到方程式右边,变成8 将-10移到方程式右边,变成1016x-6x = 102+8 16x-5x = 122+1010x = 110 11x = 132x = 11 x = 12(19)22+24x = 126-2x (20)15+16x = 41-10x解析：将-2x移到方程式左边,变成2x 解析：将-10x移到方程式左边,变成10x 将22移到方程式右边,变成-22 将15移到方程式右边,变成-152x+24x = 126-22 10x+16x = 41-1526x = 104 26x = 26x = 4 x = 1(21)18x-7 = 74-9x (22)11x-26 = 263-6x解析：将-9x移到方程式左边,变成9x 解析：将-6x移到方程式左边,变成6x 将-7移到方程式右边,变成7 将-26移到方程式右边,变成269x+18x = 74+7 6x+11x = 263+2627x = 81 17x = 289x = 3 x = 17(23)7-5x = 16-8x (24)17x-15 = 42-2x解析：将-8x移到方程式左边,变成8x 解析：将-2x移到方程式左边,变成2x 将7移到方程式右边,变成-7 将-15移到方程式右边,变成158x-5x = 16-7 2x+17x = 42+153x = 9 19x = 57x = 3 x = 3小学数学一元一次方程每日训练(3)答案一、单边未知数(1)58 = 3x-20 (2)28x-10 = 102解析：将-20移到方程式左边,变成20 解析：将-10移到方程式右边,变成10 58+20 = 3x 28x = 102+1078 = 3x 28x = 112两边交换得3x = 78 x = 4x = 26(3)6+22x = 182 (4)513 = 30x-27解析：将6移到方程式右边,变成-6 解析：将-27移到方程式左边,变成27 22x = 182-6 513+27 = 30x22x = 176 540 = 30xx = 8 两边交换得30x = 540x = 18(5)474 = 19x-1 (6)18+2x = 50解析：将-1移到方程式左边,变成1 解析：将18移到方程式右边,变成-18 474+1 = 19x 2x = 50-18475 = 19x 2x = 32两边交换得19x = 475 x = 16x = 25(7)247 = 10x-13 (8)14+19x = 109解析：将-13移到方程式左边,变成13 解析：将14移到方程式右边,变成-14 247+13 = 10x 19x = 109-14260 = 10x 19x = 95两边交换得10x = 260 x = 5x = 26(9)28+23x = 235 (10)15x-7 = 8解析：将28移到方程式右边,变成-28 解析：将-7移到方程式右边,变成7 23x = 235-28 15x = 8+723x = 207 15x = 15x = 9 x = 1(11)26-x = 18 (12)10x-4 = 156解析：将-x移到方程式右边,变成x 解析：将-4移到方程式右边,变成4 将18移到方程式左边,变成-18 10x = 156+426-18 = +x 10x = 1608 = x x = 16两边交换得x = 8(13)27x-27 = 783 (14)309 = 24x-27解析：将-27移到方程式右边,变成27 解析：将-27移到方程式左边,变成27 27x = 783+27 309+27 = 24xx = 30 两边交换得24x = 336x = 14(15)18x-26 = 442 (16)145 = 10x-25解析：将-26移到方程式右边,变成26 解析：将-25移到方程式左边,变成25 18x = 442+26 145+25 = 10x18x = 468 170 = 10xx = 26 两边交换得10x = 170x = 17(17)275 = 10x-5 (18)491 = 20x-9解析：将-5移到方程式左边,变成5 解析：将-9移到方程式左边,变成9 275+5 = 10x 491+9 = 20x280 = 10x 500 = 20x两边交换得10x = 280 两边交换得20x = 500x = 28 x = 25(19)147 = 15x-3 (20)33 = 29+2x解析：将-3移到方程式左边,变成3 解析：将29移到方程式左边,变成-29 147+3 = 15x 33-29 = 2x150 = 15x 4 = 2x两边交换得15x = 150 两边交换得2x = 4x = 10 x = 2(21)15+14x = 197 (22)7x-22 = 62解析：将15移到方程式右边,变成-15 解析：将-22移到方程式右边,变成22 14x = 197-15 7x = 62+2214x = 182 7x = 84x = 13 x = 12(23)26x-10 = 198 (24)511 = 27x-2解析：将-10移到方程式右边,变成10 解析：将-2移到方程式左边,变成2 26x = 198+10 511+2 = 27x26x = 208 513 = 27xx = 8 两边交换得27x = 513x = 19二、双边未知数(1)8x-19 = 201-3x (2)25x-16 = 368+x解析：将-3x移到方程式左边,变成3x 解析：将1x移到方程式左边,变成-x 将-19移到方程式右边,变成19 将-16移到方程式右边,变成163x+8x = 201+19 25x-x = 368+16x = 20 x = 16(3)20+24x = 68+8x (4)18+x = 8x-17解析：将8x移到方程式左边,变成-8x 解析：将1x移到方程式右边,变成-x将20移到方程式右边,变成-20 将-17移到方程式左边,变成1724x-8x = 68-20 17+18 = 8x-x16x = 48 35 = 7xx = 3 两边交换得x = 5(5)4-7x = 2x-212 (6)11x-25 = 281-7x解析：将-7x移到方程式右边,变成7x 解析：将-7x移到方程式左边,变成7x 将-212移到方程式左边,变成212 将-25移到方程式右边,变成25212+4 = 2x+7x 7x+11x = 281+25216 = 9x 18x = 306两边交换得x = 24 x = 17(7)28-12x = 2x-350 (8)14x-22 = 83-x解析：将-12x移到方程式右边,变成12x 解析：将-x移到方程式左边,变成1x将-350移到方程式左边,变成350 将-22移到方程式右边,变成22350+28 = 2x+12x 1x+14x = 83+22378 = 14x 15x = 105两边交换得x = 27 x = 7(9)14x-24 = 246+4x (10)20x-13 = 567-9x解析：将4x移到方程式左边,变成-4x 解析：将-9x移到方程式左边,变成9x 将-24移到方程式右边,变成24 将-13移到方程式右边,变成1314x-4x = 246+24 9x+20x = 567+1310x = 270 29x = 580x = 27 x = 20(11)10+14x = 442-2x (12)8+20x = 138+10x解析：将-2x移到方程式左边,变成2x 解析：将10x移到方程式左边,变成-10x 将10移到方程式右边,变成-10 将8移到方程式右边,变成-82x+14x = 442-10 20x-10x = 138-816x = 432 10x = 130x = 27 x = 13(13)30+5x = 38-3x (14)23+25x = 223+5x解析：将-3x移到方程式左边,变成3x 解析：将5x移到方程式左边,变成-5x 将30移到方程式右边,变成-30 将23移到方程式右边,变成-233x+5x = 38-30 25x-5x = 223-238x = 8 20x = 200x = 1 x = 10(15)23x-3 = 374-6x (16)2x-23 = 6x-63解析：将-6x移到方程式左边,变成6x 解析：将2x移到方程式右边,变成-2x 将-3移到方程式右边,变成3 将-63移到方程式左边,变成636x+23x = 374+3 63-23 = 6x-2x29x = 377 40 = 4xx = 13 两边交换得x = 10(17)16x-8 = 102+6x (18)16x-10 = 122+5x解析：将6x移到方程式左边,变成-6x 解析：将5x移到方程式左边,变成-5x 将-8移到方程式右边,变成8 将-10移到方程式右边,变成1016x-6x = 102+8 16x-5x = 122+1010x = 110 11x = 132x = 11 x = 12(19)22+24x = 126-2x (20)15+16x = 41-10x解析：将-2x移到方程式左边,变成2x 解析：将-10x移到方程式左边,变成10x 将22移到方程式右边,变成-22 将15移到方程式右边,变成-152x+24x = 126-22 10x+16x = 41-1526x = 104 26x = 26x = 4 x = 1(21)18x-7 = 74-9x (22)11x-26 = 263-6x解析：将-9x移到方程式左边,变成9x 解析：将-6x移到方程式左边,变成6x 将-7移到方程式右边,变成7 将-26移到方程式右边,变成269x+18x = 74+7 6x+11x = 263+2627x = 81 17x = 289x = 3 x = 17(23)7-5x = 16-8x (24)17x-15 = 42-2x解析：将-8x移到方程式左边,变成8x 解析：将-2x移到方程式左边,变成2x 将7移到方程式右边,变成-7 将-15移到方程式右边,变成158x-5x = 16-7 2x+17x = 42+153x = 9 19x = 57x = 3 x = 3小学数学一元一次方程每日训练(4)答案一、单边未知数(1)58 = 3x-20 (2)28x-10 = 102解析：将-20移到方程式左边,变成20 解析：将-10移到方程式右边,变成1058+20 = 3x 28x = 102+1078 = 3x 28x = 112两边交换得3x = 78 x = 4x = 26(3)6+22x = 182 (4)513 = 30x-27解析：将6移到方程式右边,变成-6 解析：将-27移到方程式左边,变成27 22x = 182-6 513+27 = 30x22x = 176 540 = 30xx = 8 两边交换得30x = 540x = 18(5)474 = 19x-1 (6)18+2x = 50解析：将-1移到方程式左边,变成1 解析：将18移到方程式右边,变成-18 474+1 = 19x 2x = 50-18475 = 19x 2x = 32两边交换得19x = 475 x = 16x = 25(7)247 = 10x-13 (8)14+19x = 109解析：将-13移到方程式左边,变成13 解析：将14移到方程式右边,变成-14 247+13 = 10x 19x = 109-14260 = 10x 19x = 95两边交换得10x = 260 x = 5x = 26(9)28+23x = 235 (10)15x-7 = 8解析：将28移到方程式右边,变成-28 解析：将-7移到方程式右边,变成7 23x = 235-28 15x = 8+723x = 207 15x = 15x = 9 x = 1(11)26-x = 18 (12)10x-4 = 156解析：将-x移到方程式右边,变成x 解析：将-4移到方程式右边,变成4 将18移到方程式左边,变成-18 10x = 156+426-18 = +x 10x = 1608 = x x = 16两边交换得x = 8(13)27x-27 = 783 (14)309 = 24x-27解析：将-27移到方程式右边,变成27 解析：将-27移到方程式左边,变成27 27x = 783+27 309+27 = 24x27x = 810 336 = 24xx = 30 两边交换得24x = 336x = 14(15)18x-26 = 442 (16)145 = 10x-25解析：将-26移到方程式右边,变成26 解析：将-25移到方程式左边,变成25 18x = 442+26 145+25 = 10x18x = 468 170 = 10xx = 26 两边交换得10x = 170x = 17(17)275 = 10x-5 (18)491 = 20x-9解析：将-5移到方程式左边,变成5 解析：将-9移到方程式左边,变成9 275+5 = 10x 491+9 = 20x280 = 10x 500 = 20x两边交换得10x = 280 两边交换得20x = 500x = 28 x = 25(19)147 = 15x-3 (20)33 = 29+2x解析：将-3移到方程式左边,变成3 解析：将29移到方程式左边,变成-29 147+3 = 15x 33-29 = 2x150 = 15x 4 = 2x两边交换得15x = 150 两边交换得2x = 4x = 10 x = 2(21)15+14x = 197 (22)7x-22 = 62解析：将15移到方程式右边,变成-15 解析：将-22移到方程式右边,变成22 14x = 197-15 7x = 62+2214x = 182 7x = 84x = 13 x = 12(23)26x-10 = 198 (24)511 = 27x-2解析：将-10移到方程式右边,变成10 解析：将-2移到方程式左边,变成2 26x = 198+10 511+2 = 27x26x = 208 513 = 27xx = 8 两边交换得27x = 513x = 19二、双边未知数(1)8x-19 = 201-3x (2)25x-16 = 368+x解析：将-3x移到方程式左边,变成3x 解析：将1x移到方程式左边,变成-x 将-19移到方程式右边,变成19 将-16移到方程式右边,变成163x+8x = 201+19 25x-x = 368+1611x = 220 24x = 384x = 20 x = 16(3)20+24x = 68+8x (4)18+x = 8x-17解析：将8x移到方程式左边,变成-8x 解析：将1x移到方程式右边,变成-x将20移到方程式右边,变成-20 将-17移到方程式左边,变成1724x-8x = 68-20 17+18 = 8x-x16x = 48 35 = 7xx = 3 两边交换得x = 5(5)4-7x = 2x-212 (6)11x-25 = 281-7x解析：将-7x移到方程式右边,变成7x 解析：将-7x移到方程式左边,变成7x 将-212移到方程式左边,变成212 将-25移到方程式右边,变成25212+4 = 2x+7x 7x+11x = 281+25216 = 9x 18x = 306两边交换得x = 24 x = 17(7)28-12x = 2x-350 (8)14x-22 = 83-x解析：将-12x移到方程式右边,变成12x 解析：将-x移到方程式左边,变成1x将-350移到方程式左边,变成350 将-22移到方程式右边,变成22350+28 = 2x+12x 1x+14x = 83+22378 = 14x 15x = 105两边交换得x = 27 x = 7(9)14x-24 = 246+4x (10)20x-13 = 567-9x解析：将4x移到方程式左边,变成-4x 解析：将-9x移到方程式左边,变成9x 将-24移到方程式右边,变成24 将-13移到方程式右边,变成1314x-4x = 246+24 9x+20x = 567+1310x = 270 29x = 580x = 27 x = 20(11)10+14x = 442-2x (12)8+20x = 138+10x解析：将-2x移到方程式左边,变成2x 解析：将10x移到方程式左边,变成-10x 将10移到方程式右边,变成-10 将8移到方程式右边,变成-82x+14x = 442-10 20x-10x = 138-816x = 432 10x = 130x = 27 x = 13(13)30+5x = 38-3x (14)23+25x = 223+5x解析：将-3x移到方程式左边,变成3x 解析：将5x移到方程式左边,变成-5x 将30移到方程式右边,变成-30 将23移到方程式右边,变成-233x+5x = 38-30 25x-5x = 223-238x = 8 20x = 200x = 1 x = 10(15)23x-3 = 374-6x (16)2x-23 = 6x-63解析：将-6x移到方程式左边,变成6x 解析：将2x移到方程式右边,变成-2x 将-3移到方程式右边,变成3 将-63移到方程式左边,变成636x+23x = 374+3 63-23 = 6x-2x29x = 377 40 = 4xx = 13 两边交换得x = 10(17)16x-8 = 102+6x (18)16x-10 = 122+5x解析：将6x移到方程式左边,变成-6x 解析：将5x移到方程式左边,变成-5x 将-8移到方程式右边,变成8 将-10移到方程式右边,变成1016x-6x = 102+8 16x-5x = 122+1010x = 110 11x = 132x = 11 x = 12(19)22+24x = 126-2x (20)15+16x = 41-10x解析：将-2x移到方程式左边,变成2x 解析：将-10x移到方程式左边,变成10x 将22移到方程式右边,变成-22 将15移到方程式右边,变成-152x+24x = 126-22 10x+16x = 41-1526x = 104 26x = 26x = 4 x = 1(21)18x-7 = 74-9x (22)11x-26 = 263-6x解析：将-9x移到方程式左边,变成9x 解析：将-6x移到方程式左边,变成6x 将-7移到方程式右边,变成7 将-26移到方程式右边,变成269x+18x = 74+7 6x+11x = 263+2627x = 81 17x = 289x = 3 x = 17(23)7-5x = 16-8x (24)17x-15 = 42-2x解析：将-8x移到方程式左边,变成8x 解析：将-2x移到方程式左边,变成2x 将7移到方程式右边,变成-7 将-15移到方程式右边,变成158x-5x = 16-7 2x+17x = 42+153x = 9 19x = 57x = 3 x = 3小学数学一元一次方程每日训练(5)答案一、单边未知数(1)58 = 3x-20 (2)28x-10 = 102解析：将-20移到方程式左边,变成20 解析：将-10移到方程式右边,变成10 58+20 = 3x 28x = 102+1078 = 3x 28x = 112两边交换得3x = 78 x = 4x = 26(3)6+22x = 182 (4)513 = 30x-27解析：将6移到方程式右边,变成-6 解析：将-27移到方程式左边,变成27 22x = 182-6 513+27 = 30x22x = 176 540 = 30xx = 8 两边交换得30x = 540x = 18(5)474 = 19x-1 (6)18+2x = 50解析：将-1移到方程式左边,变成1 解析：将18移到方程式右边,变成-18 474+1 = 19x 2x = 50-18475 = 19x 2x = 32两边交换得19x = 475 x = 16x = 25(7)247 = 10x-13 (8)14+19x = 109解析：将-13移到方程式左边,变成13 解析：将14移到方程式右边,变成-14 247+13 = 10x 19x = 109-14260 = 10x 19x = 95两边交换得10x = 260 x = 5x = 26(9)28+23x = 235 (10)15x-7 = 8解析：将28移到方程式右边,变成-28 解析：将-7移到方程式右边,变成7 23x = 235-28 15x = 8+723x = 207 15x = 15x = 9 x = 1(11)26-x = 18 (12)10x-4 = 156解析：将-x移到方程式右边,变成x 解析：将-4移到方程式右边,变成4 将18移到方程式左边,变成-18 10x = 156+426-18 = +x 10x = 1608 = x x = 16两边交换得x = 8(13)27x-27 = 783 (14)309 = 24x-27解析：将-27移到方程式右边,变成27 解析：将-27移到方程式左边,变成27 27x = 783+27 309+27 = 24x27x = 810 336 = 24xx = 30 两边交换得24x = 336x = 14(15)18x-26 = 442 (16)145 = 10x-25解析：将-26移到方程式右边,变成26 解析：将-25移到方程式左边,变成25 18x = 442+26 145+25 = 10x18x = 468 170 = 10xx = 26 两边交换得10x = 170x = 17(17)275 = 10x-5 (18)491 = 20x-9解析：将-5移到方程式左边,变成5 解析：将-9移到方程式左边,变成9 275+5 = 10x 491+9 = 20x280 = 10x 500 = 20x两边交换得10x = 280 两边交换得20x = 500x = 28 x = 25(19)147 = 15x-3 (20)33 = 29+2x解析：将-3移到方程式左边,变成3 解析：将29移到方程式左边,变成-29 147+3 = 15x 33-29 = 2x150 = 15x 4 = 2x两边交换得15x = 150 两边交换得2x = 4x = 10 x = 2(21)15+14x = 197 (22)7x-22 = 62解析：将15移到方程式右边,变成-15 解析：将-22移到方程式右边,变成22 14x = 197-15 7x = 62+2214x = 182 7x = 84x = 13 x = 12(23)26x-10 = 198 (24)511 = 27x-2解析：将-10移到方程式右边,变成10 解析：将-2移到方程式左边,变成2 26x = 198+10 511+2 = 27x26x = 208 513 = 27xx = 8 两边交换得27x = 513x = 19二、双边未知数(1)8x-19 = 201-3x (2)25x-16 = 368+x解析：将-3x移到方程式左边,变成3x 解析：将1x移到方程式左边,变成-x 将-19移到方程式右边,变成19 将-16移到方程式右边,变成163x+8x = 201+19 25x-x = 368+1611x = 220 24x = 384x = 20 x = 16(3)20+24x = 68+8x (4)18+x = 8x-17解析：将8x移到方程式左边,变成-8x 解析：将1x移到方程式右边,变成-x将20移到方程式右边,变成-20 将-17移到方程式左边,变成1724x-8x = 68-20 17+18 = 8x-x16x = 48 35 = 7xx = 3 两边交换得x = 5(5)4-7x = 2x-212 (6)11x-25 = 281-7x解析：将-7x移到方程式右边,变成7x 解析：将-7x移到方程式左边,变成7x 将-212移到方程式左边,变成212 将-25移到方程式右边,变成25212+4 = 2x+7x 7x+11x = 281+25216 = 9x 18x = 306两边交换得x = 24 x = 17(7)28-12x = 2x-350 (8)14x-22 = 83-x解析：将-12x移到方程式右边,变成12x 解析：将-x移到方程式左边,变成1x将-350移到方程式左边,变成350 将-22移到方程式右边,变成22350+28 = 2x+12x 1x+14x = 83+22378 = 14x 15x = 105两边交换得x = 27 x = 7(9)14x-24 = 246+4x (10)20x-13 = 567-9x解析：将4x移到方程式左边,变成-4x 解析：将-9x移到方程式左边,变成9x 将-24移到方程式右边,变成24 将-13移到方程式右边,变成1314x-4x = 246+24 9x+20x = 567+1310x = 270 29x = 580x = 27 x = 20(11)10+14x = 442-2x (12)8+20x = 138+10x解析：将-2x移到方程式左边,变成2x 解析：将10x移到方程式左边,变成-10x 将10移到方程式右边,变成-10 将8移到方程式右边,变成-82x+14x = 442-10 20x-10x = 138-816x = 432 10x = 130x = 27 x = 13(13)30+5x = 38-3x (14)23+25x = 223+5x解析：将-3x移到方程式左边,变成3x 解析：将5x移到方程式左边,变成-5x 将30移到方程式右边,变成-30 将23移到方程式右边,变成-233x+5x = 38-30 25x-5x = 223-238x = 8 20x = 200x = 1 x = 10(15)23x-3 = 374-6x (16)2x-23 = 6x-63解析：将-6x移到方程式左边,变成6x 解析：将2x移到方程式右边,变成-2x 将-3移到方程式右边,变成3 将-63移到方程式左边,变成636x+23x = 374+3 63-23 = 6x-2x29x = 377 40 = 4xx = 13 两边交换得x = 10(17)16x-8 = 102+6x (18)16x-10 = 122+5x解析：将6x移到方程式左边,变成-6x 解析：将5x移到方程式左边,变成-5x 将-8移到方程式右边,变成8 将-10移到方程式右边,变成1016x-6x = 102+8 16x-5x = 122+1010x = 110 11x = 132x = 11 x = 12(19)22+24x = 126-2x (20)15+16x = 41-10x解析：将-2x移到方程式左边,变成2x 解析：将-10x移到方程式左边,变成10x 将22移到方程式右边,变成-22 将15移到方程式右边,变成-152x+24x = 126-22 10x+16x = 41-1526x = 104 26x = 26x = 4 x = 1(21)18x-7 = 74-9x (22)11x-26 = 263-6x解析：将-9x移到方程式左边,变成9x 解析：将-6x移到方程式左边,变成6x 将-7移到方程式右边,变成7 将-26移到方程式右边,变成269x+18x = 74+7 6x+11x = 263+2627x = 81 17x = 289x = 3 x = 17(23)7-5x = 16-8x (24)17x-15 = 42-2x解析：将-8x移到方程式左边,变成8x 解析：将-2x移到方程式左边,变成2x 将7移到方程式右边,变成-7 将-15移到方程式右边,变成158x-5x = 16-7 2x+17x = 42+153x = 9 19x = 57x = 3 x = 3。
一元一次方程30道题精选
一元一次方程1、2233554--+=+-+x x x x 2、解方程：104.018.027.02.01.0=+-x x 3.615+x =819+x －31x - 4、23|x +5|=5. 5、 232124x x ---=-6、131236y y y y +-=-- 7、1122(1)(1)223x x x x ⎡⎤---=-⎢⎥⎣⎦; 8、432.50.20.05x x ---=9、43(1)323322x x ⎡⎤---=⎢⎥⎣⎦10、若()23340x y -++=，求xy 的值。
11、已知126,27y x y x =-=+，若①122y y =，求x 的值；②当x 取何值时，12y y 与小3-；③当x 取何值时，12y y 与互为相反数12、若27133m m -+与互为相反数，则m =（ ）13、 若关于x 的方程230m mx m --+=是一元一次方程，则这个方程的解是( )14、 若2a 与1a -互为相反数，则a 等于15、1y =是方程()232m y y --=的解，则m =16. 如果22340a x --=是关于x 的一元一次方程，那么a =17、在等式()2a b h S +=中，已知800, =30, 20S a h ==，则b = 18、单项式2133185x x a a b ++-与是同类项，则x =19、某品牌的电视机降价10﹪后每台售价为2430元，则这种彩电的原价为每台 元。
20、有两桶水，甲桶有水180升，乙桶有水150升，要使甲桶水的体积是乙桶水的体积的两倍，则应由乙桶向甲桶倒 升水。
21. 若关于x 的方程230m mx m --+=是一元一次方程，则这个方程的解是( )22、一队师生共328人，乘车外出旅行，已有校车可乘64人，如果租用客车，每辆可乘44人，那么还要租用多少辆客车？在这个问题中，如果还要租x 辆客车，可列方程为( ) 23. 如果方程5x=-3x+k 的解为-1，则k= 。
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1、．
2、
3、
4、34113 [()8]1 43242
x x
--=+
5、
341
1 25
x x
-+
-=
6、
7、
8、
9、
10、
11、
12、
13、
14、
15、16、
17、．
18、
19、．
20、
y+5y+1
y=1
124
--
21、．
22、
23、.
24、．
25、
329
(200)(300)300 101025
x x
+--=⨯26、
3x-292x x-1
=
342
-
-
27、 (1)
(2)
28、求下列各式中x的值：
（1）（2）（3）
29、；
30、解关于x的方程
b（a＋x）－a＝（2b＋1）x＋ab（a≠0）.
参考答案
一、计算题
1、x=－3
2、解:………………………………2分
x=8 ………………………………4分
3、
4、
5、
6、 7/9
7、
8、解：方程两边同时乘以6，得
9、＝－9.2
10、＝－9；
11、y=；
12、x=－9；
13、解：∵
∴
8+12=18－18－9+18
8=－3
∴=－
14、解：
第3页----共3页（答案）
15、22、先化简再求值（5分）
16、x = 5
17、
18、解：，
19、解：去分母，得
，
，
去括号，整理，得
，
去分母3，解得
．
20、y－＝1－
解：
……2′
………3′
…………4′
21、．
22、原方程可化为: 去分母, 得40x+60=5(18－18x)－3(15－30x), 去括号
得40x+60=90－90x－45+90x, 移项, 合并得40x=－15, 系数化为1, 得x=
点拨: 此题的麻烦之处在于方程中分子、分母均有小数, 利用分数的基本性质, 分子分母同时扩大或缩小相同的倍数, 分数值不变, 可将小数化成整数.
23、解：原方程化为，整理得12x=6.解得x=.
24、．
25、x=216
26、解:依题意，得.
去分母，4(3x-2)-3(9-2x)=6(x-1),12x-8-27+6x=6x-6,12x=29,所以x=.
27、解：(1)去分母得：15一3(一2)=5(2一5)一45
即2=―76．∴=―38
(2)―1―3―=2
―=6 ∴=―8
28、（1）（2）（3）
29、解：先把系数化为整数，得
，
再去分母，两边都乘以60，得
，
去括号，合并同类项，得
，
；
30、解：适当去括号，得
ab＋bx－a＝（2b＋1）x＋ab，
移项，得
bx－（2b＋1）x＝a＋ab－ab，
合并同类项，得
（b－2b－1）x＝a，
即－（b＋1）x＝a，
当b≠－1时，有b＋1 ≠0，方程的解为
x＝．
当b＝－1 时，有b＋1＝0，又因为a≠0，所以方程无解．（想一想，若a＝0，则如何？。