Question

можете помочь (1,2,) и всё остальное​

Answer 1

1. а) 3(12m+11)+2(12-15m) = (36m+33)+(24-30m) = (36m-30m)+(24+33) = 6m+57
б) 6+4х = 70
4х = 70-6
4х = 64
x = 64:4
x = 4