11a+9a+5a = 25а
4y+16y-5y = 15у
y+6y+y = 8у
45x-15x-6x = 24х
74a+6a-40a = 40а
6k+12+4k = 10k +12
35x+9+15x+9 = 50х + 18
54y-34y+33 = 20у + 33
19x+55+21x = 40х + 55
88x+12x-22 = 100х - 22
9·x·50 = 450х
a·25·4 = 100а
6·x·7·3 = 126х
(121:11)·x = 11х
5·19·a = 95а