(12m - 5m) * 4 = 252 (4n + 3n) * 11 = 154
7m = 252 : 4 7n = 154 : 11
7m = 63 7n = 14
m = 63 : 7 n = 14 : 7
m = 9 n = 2
45 : (4m - m) = 3 (12x - 5x) : 4 = 14
3m = 45 : 3 7x = 14 * 4
3m = 15 7x = 56
m = 15 : 3 x = 56 : 7
m = 5 x = 8
132 - (x - 5) * 9 = 69 123 - (8x - 11) * 2 = 49
(x - 5) * 9 = 132 - 69 (8x - 11) * 2 = 123 - 49
(x - 5) * 9 = 63 (8x - 11) * 2 = 74
x - 5 = 63 : 9 8x - 11 = 74 : 2
x - 5 = 7 8x - 11 = 37
x = 7 + 5 8x = 37 + 11
x = 12 8x = 48
x = 48 : 8
x = 6
3 (х + 7) + 16 = 52
3 (х + 7) = 52 - 16
3 (х + 7) = 36
х + 7 = 36 : 3
х + 7 = 12
х = 12 - 7
х = 5
