Решите уравнение 30-15z=40-14z 11m-13=15-3m 28=7n-7 8y-15=7y-12 -8x+55=-3x

Question

Решите уравнение
30-15z=40-14z
11m-13=15-3m
28=7n-7
8y-15=7y-12
-8x+55=-3x

Answer 1

30-15z=40-14z
30-40=15z-14z
z=-10

11m-13=15-3m
11m+3m=15+13
14m=28
m=28:14
m=2

28=7n-7
28+7=7n
35=7n
n=35:7
n=5

8у-15=7у-12
8у-7у=15-12
у=3

-8х+55=-3х
55=8х-3х
55=5х
х=55:5
х=11