1) 9t + 4t - 286 = 013t - 286 = 013t = 286t = 22
2) 14x + 9x + 88 = 27223x + 88 = 27223x = 184x = 8
3) 25x - 16x + 54 = 1629x + 54 = 1629x = 108x = 12
4) 144 / (x - 3) = 36144 = 36(x - 3)144 = 36x - 108252 = 36xx = 7
5) 21(y - 8) = 8421y - 168 = 8421y = 252y = 12
6) (x + 67) / 18 = 4x + 67 = 72x = 5
Ответ: t = 22, x = 8, x = 12, x = 7, y = 12, x = 5.
1) 9t + 4t - 286 = 0
13t - 286 = 0
13t = 286
t = 22
2) 14x + 9x + 88 = 272
23x + 88 = 272
23x = 184
x = 8
3) 25x - 16x + 54 = 162
9x + 54 = 162
9x = 108
x = 12
4) 144 / (x - 3) = 36
144 = 36(x - 3)
144 = 36x - 108
252 = 36x
x = 7
5) 21(y - 8) = 84
21y - 168 = 84
21y = 252
y = 12
6) (x + 67) / 18 = 4
x + 67 = 72
x = 5
Ответ: t = 22, x = 8, x = 12, x = 7, y = 12, x = 5.