Question

Решите уравнение:1)15х-9=7+11х ; 2)-4-3х=2х-49 ; 3)7+3х=26+2х ; 4)5х-3(х+2)=5х-6 ; 5)6х-19=5х+1

Answer 1

1) 15х - 9 = 7 + 11х
15 х - 11х = 7 + 9
4х = 16
х = 16 : 4 = 4
2) -4 - 3х = 2х - 49
-4 + 49 = 2х + 3х
5х = 45
х = 45 : 5 = 9
3) 7 + 3х = 26 + 2х
3х - 2х = 26 - 7
х = 19
4) 5х - 3(х + 2) = 5х - 6
5х - 3х - 6 = 5х - 6
5х - 3х - 5х = - 6 - 6
-3х = -12
 х = 12 : 3 = 4
5) 6х - 19 = 5х + 1
6х - 5х = 1 + 19
х = 20