Verified answer

 6х+18=0

6х=-18

х=-3

2х+3=3х-2

2х-3х=-2-3

-х=-5

х=5

3(5-х)=11+2х

15-3х=11+2х

-3х-2х=11-15

-5х=-4

х=4/5=0,8

Verified answer

6х+18=0

6х=-18

х=-18/6

х=-3

2х+3=3х-2

3+2=3х-2х

х=5

3(5-х)=11+2х

15-3х=11+2х

15-11=2х+3х

4=5х

х=4/5

х=0,8