А) 22d-5d=17d
50s-25s = 25s
40z-15z = 25z
30q-20q = 10q
34a-19a = 15a
50x-28x = 22x
60t-25t = 35t
80n-25n = 55n
32m-20m = 12m
б) (a+b)5+9a+3b = 5a+5b+9a+3b = 14a+8b
13(a-b) -7b+4a = 13a-13b-7b+4a = 17a-20b
6(x+a)-5a =6x+6a-5a = 6x+1a
30x-(5x+4x) = 30x-9x = 21x