(m-n)/n=3 m-n=3n m=4n
(5(4n)+2n)/4n=22n/4n=5.5
2/√7 · 7/7 = 2√7/7 второе аналогично
32.11
2) (5t+3)^2
4) (11a-2c)^2
6) (6t-7s)^2