Ответ: 1. А) - (3y + 7 ) = 8 - 2 (8-y)

-3y-7 = 8-16+2y

-3y-2y = 8-16+7

-5y = - 1

y = -1 :(- 5)

y = 0,2

Б) -5 (2-2x) = 2(x-3)+4

-10+10x=2x-6x+4

10x-2x+6x=4+10

14x=14

x= 14:14

x=1

В) 2x-4(x+7)=3(2-x)

2x-4x-28=6-3x

2x-4x+3x=6+28

x=34

2.a) 1,26x+3,58=1,74x+6,46

1,26x-1,76x=6,46-3,58

-0,5x=2.88

x = 2.88:(-0,5)

x = -5,76

Б) 0,88 -(5,12+0,08y)=4,92y-y

0,88-5,12-0,08y=4,92y-y

-0,08y-4,92y+y= -0,88 + 5,12

-4y=4.24

y=4.24:(-4)

y= 1.06