ДК
Ден Кочуев
Ответ
315/x + 24 = 39
315/x = 39 - 24
315/x = 15
315 = 15*x
x = 315/15
x = 21
3360 / (3x + 15) = 14
3360 = 14 * (3x + 15)
3360 = 14 * 3 * (x + 5)
x + 5 = 3360 / (14 * 3) = (3360/3) / 14 = 1120 / 14 = 80