Question

Помогите решить уравнения!
1/9х=-8/9
5(х-4)=х+8
3(х+6)=х+2(х+9)

Answer 1

х=-8/9:1/9=-8/9*9/1=-8

5х-20=х+8
5х-х=8+20
4х=28
х=28:4=7

3х+18=х+2х+18
3х-х-2х=18-18
х=0