Question

3(-1-х)-2х=9
6(4-х)+3х=3
-9(8-х)-4х=-2
-5(-1+9х)-5х=-1
решите пожалуйста,кому не трудно:)

Answer 1

1) - 3 - 3x - 2x = 9
- 5x = 9 + 3
- 5x = 12
x = - 2,4

2) 24 - 6x + 3x = 3
24 - 3x = 3
- 3x = - 21
x = 7

3) - 72 + 9x - 4x = - 2
5x = 70
x = 14

4) 5 - 45x - 5x = - 1
- 50x = - 6
x = 0,12