七下一元一次不等式组100题(有答案)
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1. 3(2x+5)<2(4x+6)
2. 10-4(x -3)≤2(x -2)
3. 3x -2(9-x)>3(7+2x)-(11-6x)
4. 2(3x -1)-3(4x+5)≤x -4(x -7)
5. 2(x -1)-x>3(x -1)-3x+5
6. 3[y -2(y -7)]≤4y
7. 15-(7+5x)≤2x+(5-3x) 8. 2(x -4)-3<1-3(x -2)
9. 2+3(y+1)8
≤2−
y−34
10. 0.5x+3(1+0.2x)>0.4x -0.6 11. 2[4
3x −(2
3x −1
2)]≤3
4x 12.
0.04x+0.09
0.05−
0.3+0.2x 0.3
≥
x−52
13. 7(4-x)-2(4-3x)<-4x 14. 2+3(y+1)8<3+
y−14
15. x
3+
x−12
<1
16. 3[x -2(x -2)]>x -3(x -3) 17. x +x
2+
x+13
<1+
x+86
18. 4
3x −4(1+x )<32(1
6x −2) 19. 5−x
3≥1
2−2x+14
20. 3y+13+1<
7y−35
+
2(y−2)15
21.
x+52
−1<
3x+22
22. {2x −5<3x x−22>x 3
23. {x
2
−x
3
>−1
2(x −3)−3(x −2)>−6
24. {x
2
+4≤1
x −8>2(x +2)
25. {x −3(x −2)<4
2x+1
3
≥x −1
26. {2(x +8)≤10−4(x −3)
x−12−4x+16<1
27. {3x−3
2
−
2x+1
3
>x
12
[x −2(x +3)]<1
28. {x −3>1−x
x −5>5−x
2 x −4>x
2
29. 4≤
3x−2−2
<7
30. 2x -1≤x -5≤4 - 3
2x 31. y −
3y−83
≤
2(10−y )
7
+1
32. (1+y
3)(y 2+1)>(1−y−22
)(y 2+1)
33. {
3x −2<8
2x −1>2
34. {5−7x ≥2x −4 1−34
(x −1)<0.5
35. 2x<1-x≤x+5
36. {3(1−x )<2(x +9)
x−3
0.5
−
x+40.2
≤−14
37. {
−3x ≤0
4x +7>0
38. {1
2x −1
39. {2x −5<3x x−22
>x 3
40. {x
2
−x
3
>−1
2(x −3)−3(x −2)>−6
41. {x
2
+4≤1
x −8>2(x +2)
42. {5x −3≥2x 3x−12
<4
43. {2x +7>3x −1
x−25≥0
44. {
1+2x 3
>x −1
4(x −1)<3x −4
45. −1<
−2−3x 4
<1
46. {2(x +1)
−1≥34+x <7
47. {2x −1≥3(x −2)−2x <4
48. {3x +1>x +32x −1 49. {x +3>42x <6 50. {2x −5≥3(x −1)x 3−x−12 <1 51. {x <2x +1 3x −2(x −1)≤4 52. {x +3>0 2(x −1)+3≥3x 53. {3x +1<2(x +2)−13x ≤5 3x +2 54. { x+1 3 >0 2(x +5)≥6(x −1) 55. {5x −9<3(x −1)1−32x ≤1 2x −1 56. {2(x −3) ≤5x +54x <3x +1 57. {2x +3≤x +6x+22>x+33 58. {−3(x −2)≤4−x 1+2x 3 >x −1 59. {4x −3<5x x−42+x+26 ≤13 60. {1 2(x +4)<2 x −3(x −1)>5 61. { x −1+3x 2>−3 5x −12≤2(4x −3) 62. {1−2(x −1)≤53x−22 2 63. { x−32 +3>x +1 1−3(x −1)≤8−x 64. {5x +2>3(x −1)7−32x ≥1 2x −1 65. {2(x +2) 66. {2x +5≤3(x +2)x −1<2 3 x 67. {3(x +2)≥x +4x−12 <1 68. {2−x >0 5x+12+1≥2x−13 69. {5 6 −3x ≤1 6(x +5) 2(x +19)−9x >5[x −2(x −3)] 70. {3x −2≤x +6 5x−22 +1>x 71. {2x +2≥3x +3 x−13 −x+42 <−2 72. {5x +3(x −2)≤101+3x 2>x −1 73. { x−24+2≥x 1−3(x −2)<9−x 74. {5x −2>3(x +1)12x −1≤7−3 2x 75. {4x −10<0 5x +2>3x 11−2x ≥1+3x 76. { 2x−1 3 − 5x+1 2 ≤1 5x −1<3(x +1)