100 junior high school math problems are evaluated by substituting the following formula.

1) True or false:

Judge whether the following equation is a linear equation:

①-3x-6x2=7()

③5x+ 1-2x=3x-2()

④3y-4=2y+ 1。 ( )

Judge whether the solution of the following equation is correct:

① Solve equation 3y-4=y+3.

3y-y=3+4，2y=7，y=3.5

② Solving equation: 0.4x-3=0. 1x+2.

0.4x+0. 1x = 2-3； 0.5x=- 1，x=-2

③ Solving the equation

5x+ 15-2x-2= 10，3x=-3，x =- 1；

④ Solving the equation

2x-4+5-5x=- 1，-3x=-2，x=。 ( )

2) Fill in the blanks:

(1) If 2(3-a)x-4=5 is a linear equation about x, then a≦_

(2) The solution of equation ax=3 about X is a natural number, so the value of integer A is _

(3) The solution of equation 5x-2(x- 1)= 17 is _

(4) If x = 2 is the solution of equation 2x-3=m-, then m=_.

(5) If -2x2-5m+ 1=0 is a linear equation about x, then m=_.

(6) When y=_, the algebraic expressions 5y+6 and 3y-2 are reciprocal.

(7) When m=_, the solution of the equation is 0.

(8) If a≠0 is known, the solution of equation 3ab-(a+b)x=(a-b)x about x is _ _ _ _ _.

3) Multiple choice questions:

The solution of (1) equation ax=b is ().

A. there is a solution x = B. There are countless solutions

C. No solution D. When a≠0, x=

(2) Solve equation (x- 1)=3. Among the following variants, the simpler one is ().

A. multiply both sides of the equation by 4 to get 3( x- 1)= 12.

B. remove the brackets and get x- =3.

C. divide both sides by the same number to get x- 1=4.

D. finish, acquire

(3) Equation 2- Denominator ()

a . 2-2(2x-4)=-(x-7)b . 12-2(2x-4)=-x-7

C.12-2 (2x-4) =-(x-7) D. None of the above answers are correct.

(4) If the algebraic ratio is greater than 1, the value of x is ().

13 BC

(5)x= 1.5 is the solution of equation ().

A.4x+2=2x-(-2-9)

B.2{3[4(5x- 1)-8]-2}=8

C.4x+9 =6x+6

4) Answer the following questions:

When (1)x is equal to what number, are the values of algebraic expressions equal?

(2) When y is equal to what number, the value of the algebraic expression is 3 less than that of the algebraic expression?

(3) When m is equal to what number, the sum of the value of algebraic expression 2m- and the value of algebraic expression is equal to 5?

(4) Solve the following equation about x:

①ax+b = bx+a； (a≠b)；

Three. Simplify and simplify the assessment

Cross-cultural assessment:

1 、-9(x-2)-y(x-5)