Question

Помогите пожалуйста решить уравнения: 8-4(-7x+8)=9 1-6(2x-3)=-2 10+9(-10-9x)=8-x -1+8(7-6x)=2x+6

Answer 1

8-4(-7x+8)=9
8+28х-32=9
28х=9-8+32
28х=33
х=33/28

1-6(2x-3)=-2
1-12х+18=-2
-12х=-2-1-18
-12х=-21
х=1,75


10+9(-10-9x)=8-x
10-90-81х=8-х
-81х+х=8-10+90
-80х=88
х=-1,1


-1+8(7-6x)=2x+6
-1+56-48х=2х+6
-48х-2х=6+1-56
-50х=-49
х=0,98

Answer 2

1) 8 - 4(-7x + 8) = 9 8 + 28x - 32 = 9 28x - 24 = 9 - 8 28x - 24 = 1 28x = 1 + 24 28x = 25 x = 25 / 28

2) 1 - 6(2x - 3) = -2 1 - 12x + 18 = -2 -12x + 19 = -2 -12x = -2 - 19 -12x = -21 x = -21 / -12 x = 7 / 4

3) 9(-10 - 9x) = 8 - x - 1 -90 - 81x = 7 - x -81x + x = 7 + 90 -80x = 97 x = 97 / -80 x = -97 / 80

4) 8(7 - 6x) = 2x + 6 56 - 48x = 2x + 6 -48x - 2x = 6 - 56 -50x = -50 x = -50 / -50 x = 1

Таким образом, значения переменных равны: x = 25 / 28, x = 7 / 4, x = -97 / 80, x = 1.