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The first volume of the first day of junior high school solves seven problems of equation.
( 1)、2(7x-5)=3

14x= 13

X= 13/ 14

(2)、4(2x- 1)=3(5x+ 1)

-7x=7

X=- 1

(3)、3x-42=9x-2

-6x=40

X=-20/3

(4)、2x-5(3-2x)= 10

2x- 15+ 10x= 10

12x=25

X=25/ 12

(5)、2(2x+ 1)-(5x- 1)=6

4x+2-5x+ 1=6

-x=3

X=-3

(6)、2x+ 14=28- 14x

16x= 14

X=8/7

(7)、60+3/ 10 x-60+2/ 10 x = 108

1/2 x= 108

X=2 16