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