1)7x - ( 3 + 2x ) = x + 9
7x - 3 - 2x = x + 9
7x - 2х - х = -3 - 9
4х = - 12
х= -3
2) 13 - ( 2х - 5 ) = х - 3
13 - 2х + 5 = х - 3
-2х - х = - 13 + 5 -3
- 3х = - 12
х = 4
3)3х - ( 10 - 9х ) = 22х
3х - 10 + 9х = 22х
3х + 9х + 22х = 10
24х = 10
х = 2,4
4) 26 - ( 17 - 2х ) = 5х
26 - 17 + 2х = 5х
2х - 5х = - 26 + 17
-3х = -6
х = 2
1)7x - ( 3 + 2x ) = x + 9
7x - 3 - 2x = x + 9
7x - 2х - х = -3 - 9
4х = - 12
х= -3
2) 13 - ( 2х - 5 ) = х - 3
13 - 2х + 5 = х - 3
-2х - х = - 13 + 5 -3
- 3х = - 12
х = 4
3)3х - ( 10 - 9х ) = 22х
3х - 10 + 9х = 22х
3х + 9х + 22х = 10
24х = 10
х = 2,4
4) 26 - ( 17 - 2х ) = 5х
26 - 17 + 2х = 5х
2х - 5х = - 26 + 17
-3х = -6
х = 2