(Add 2 to both left and right sides of the equation)

4x-2+2=x+3+2

4x=x+5

(2) 7 to 2 times = 3 to 5 times

(both left and right sides of +2x equation)

7-2x+2x=3-5x+2x

7=3-(5x-3x)

7 = 3-2 times

(3)2x+ 10=0

(Put the left and right sides of the equation at the same time-10)

2x+ 10- 10 = 0- 10

2x=- 10

(4)9x=7x+4.8

(Put the left and right sides of the equation at the same time -7x)

9x-7x=7x+4.8-7x

2x=4.8

(5) 10x-8=8x+ 1

(Add 8 to both left and right sides of the equation)

10x-8+8=8x+ 1+8

10x=8x+9

(Put the left and right sides of the equation at the same time -8x)

10x-8x=8x+9-8x

2x=9

(6)-7x=2/3

(Use 2/3 inch to 7 inch)

(7)-2x=3x+8

(both left and right sides of +2x equation)

-2x+2x=3x+2x+8

0=5x+8

(8)3×7+6×= 4×8

(Put the left and right sides of the equation at the same time -6x)

3x-7+6x-6x=4x-8-6x

3x-7 = 4x-8x

(both left and right sides of +6x equation)

3x 7+6x = 4x 8

9x-7=4x-8

(Add 8 to both left and right sides of the equation)

9x-7+8=4x-8+8

9x+ 1=4x

② Let the middle line be A, B, C, D, the first behavior E and the third behavior F respectively.

An opposite surface c

∫c = 1

∴a=(- 1)

∫b opposite surface d

∫b = 3

∴d=(-3)

E opposite surface f

∫e =-5

∴f=5

∴ The middle lines are (-1), 3, 1 and (-3) respectively.

The first line is -5.

The third row is 5.