17
Пошаговое объяснение:
(3x - 1 )/5 - (2x + 6)/8 = 5
(24x - 8 - 10x - 30)/40 = 5
(14x - 38)/40 = 5
14x - 38 = 200
14x = 238
x = 238 / 14
x = 17
