9 - х = 11 - х 25 - 3b = 9 - 5b 5x - 45 = 3x + 25
-х + х = 11 - 9 -3b + 5b = 9 - 25 5х - 3х = 25 + 45
0х = 2 2b = -16 2х = 70
нет решений b = -16 : 2 х = 70 : 2
b = -8 х = 35
6х - 8 = 3х + 22 4х + 55 = 2х - 25 3х - 6 = х + 44
6х - 3х = 22 + 8 4х - 2х = -25 - 55 3х - х = 44 + 6
3х = 30 2х = -80 2х = 50
х = 30 : 3 х = -80 : 2 х = 50 : 2
х = 10 х = - 40 х = 25
5х - 8 = 2х + 16 13х - 11 = 8х + 5
5х - 2х = 16 + 8 13х - 8х = 5 + 11
3х = 24 5х = 16
х = 24 : 3 х = 16 : 5
х = 8 х = 3,2