a) (x + 74) - 318 = 200
(x + 74) = 200 + 318
(x + 74) = 518
x = 518 - 74
x = 444
b) 3636 : (12x - 91) = 36
(12x - 91) = 3636 : 36
(12x - 91) = 101
12x = 101 + 91
12x = 192
x = 192 : 12
x = 16
c) (x : 23 + 54) x 67 = 8911
(x : 23 + 54) = 8911 : 67
(x : 23 + 54) = 133
x : 23 = 133 - 54
x : 23 = 79
x = 79 x 23
x = 1817
bn vote cũng đc, ko cũng đc