5.123 Решите уравнение:

a) -36x + 660 = -3x
-33x = -660
x = 20
б) 9z - 350 = 4z
5z = 350
z = 70
в) 8x + 83 = 3x - 49
5x = -132
x = -132/5
г) 43 - 7z = 27 - 9z
2z = -16
z = -8
д) 41 + 23y = 341 + 12x
23y - 12x = 300
е) 21x - 34 = 12x - 10
9x = 24
x = 24/9 = 8/3