1) (x - 16) * 9 = 126
x - 16 = 126 / 9
x - 16 = 14
x = 16 + 14
x = 30
2) 28 * (x + 5) = 224
x+5 = 224 / 28
x+5 = 8
x = 8 - 5
x= 3
3) (x+76) / 7 = 15
x+76 = 15 * 7
x+76 = 105
x = 105 - 76
x = 29
1) (12m - 5m) * 4 = 252
12m - 5m = 7m
7m * 4 = 252
7 * 4 = 28
28 * m = 252
m = 252 / 28
m = 9
2) (4n + 3n) * 11 = 154
4n + 3n = 7n
7n * 11 = 154
7*11 = 77
77 * n = 154
n = 154 / 77
n = 2
3) 45 / (4m - m) = 3
4-1=3
45 / 3m = 3
3m = 45 / 3
3m = 15
m = 15 / 3
m = 5