Bài 62:
a) 2436 : x = 12 c) 12 . (x - 1) = 0
x = 12 . 2436 x - 1 = 0 : 12
x = 29232 x - 1 = 0
x = 0 + 1
x = 1
b) 6 . x - 5 = 613 d) 0 : x = 0
6 . x = 613 + 5 x = 0 . 0
6 . x = 618 x = 0
x = 618 : 6
x = 103
Bài 64:
a) (x - 47) - 115 = 0 b) 315 + (146 - x) = 401
x - 47 = 0 + 115 146 - x = 401 - 315
x - 47 = 115 146 - x = 86
x = 115 + 47 x = 146 - 86
x = 162 x = 60