Question

(x*3)-20=(x+10)
Помогите

Answer 1

(x*3)-20=(x+10)
3х-20=х+10
3х-х=10+20
2х=30
х=30:2
х=15

Answer 2

Смс

Answer 3

3x-20=x+10

2x=30

x=15

3*15-20=15+10

25=25