помогите пж заранее спасибо

780

1) 2х+17 = 22+3х
2х-3х = 22-17
-х = 5
х = -5

2)18+3х = х+14
3х-х = 14-18
2х = -4
х = -2

3)25-4х = 12-5х
-4х+5х = 12-25
х = -13

4)13х+27 = 16х+4.5
13х-16х = 4.5-27
-3х = -22.5
х = 7.5

5)21х+45 = 17+14х
21х-14х = 17-45
7х = -28
х = -4

6)13х+70 = 2х+15
13х-2х = 15-70
11х = -55
х = -5