(12m-5m) x 4 =252
7m=252/4
7m=63
m=63/7
m=9
(4n+3n)x11=154
раскроем скобки
44n+33n = 154
77n-154 = 0
77n = 154
n = 2
(17n-8n)x13=351
221n-104n = 351
117n-351 = 0
117n = 351
n = 3
(12m-5m) x 4 =252
7m=252/4
7m=63
m=63/7
m=9
(4n+3n)x11=154
раскроем скобки
44n+33n = 154
77n-154 = 0
77n = 154
n = 2
(17n-8n)x13=351
раскроем скобки
221n-104n = 351
117n-351 = 0
117n = 351
n = 3