(12m-5m)*4=252 (4n+3n)*11=154 45:(4m-m)=3

Question

(12m-5m)*4=252
(4n+3n)*11=154
45:(4m-m)=3

Answer 1

7m×4=252
7m=252:4
7m=63
m=63:7
m=9

7n×11=154
7n=154:11
7n=14
n=14:7
n=2

45:3m=3
3m=45:3
3m=15
m=15:3
m=5