Establising equation 列方程 (国际学校练习)

Multiple choice questions ：

1、of the following equations ，that one does n ot involve a variable is ( ).

A. X=-3

B.4+3=7

C.X 2+1=0

D.2x -y=7

2、of the following equations ， there is/are ( ) with variable.

①2x 2+1=3x -4 ②5y -1=0 ③6x 2=-1 ④2t+1=4

A.1

B.2

C.3

D.4

Fill in the blanks

1、A variable in an equation is also called a/an_______.

2、To find an unknown , we set up an equal relationship between known numbers and unknown numbers, this is called______.

3、In the equation

023=-x xy , the coefficient in the term”-x” is ______, and the degree of the term xy 2

3is_____. 4、In the equation 0432

2

=--y y , the terms containing unknowns are ______ and ______.

Establish equation based on the conditions given below.

1、a number is

165greater than 54of the number

2、

54of the number is 16

5 greater than the number itself.

Establish equations based on the quantitative relationship given below.

1、the sum of 2 times x and 3 is 11

2、The difference between 12 and x squared is 8

3、The sum of x cubed and 4 is 12

4、X is greater than its opposite number

5、12 minus x equals 8

6、3 times the sum of x and 2 equals 6

7、The square of the sum of x and -9 equals 25

8、X is 6 less than its opposite number

9、The reciprocal of a equals 4 times x

10、32of the difference between x and -3 equals 7

2

According to the formula you have learned,establish equations with suitable variables

1) given that the area of circle is 64 square centimetres, find the diameter of the circle

2) The length of a rectangle is 3 times the width ,its perimeter is 48 centimeters , find the width of the rectangle .

A boarding school needs to allocate students into dormitories when school starts, if a students share one dormitory , there would be 5 dormitories left unoccupied , if 3 students share one dormitory , there would be 100 students left unallocated ,how many boarding students are there in the school ?establish an equation with a suitable variable.