Решим уравнения:
a) 83x - 67x = 416
16x = 416
x = 416 / 16
x = 26
Ответ: x = 26
б) 23x - 12x + 3x + 6 = 90
14x + 6 = 90
14x = 90 - 6
14x = 84
x = 84 / 14
x = 6
Ответ: x = 6
в) (17x - 8x + 3) : 6 = 14
(9x + 3) : 6 = 14
9x + 3 = 14 * 6
9x + 3 = 84
9x = 84 - 3
9x = 81
x = 81 / 9
x = 9
Ответ: x = 9