56 - (x + 12) = 24
56 - x - 12 = 2444 - x = 24-x = -20x = 20
Проверка:56 - (20 + 12) = 56 - 32 = 24
Ответ: x = 20
56 - (x + 12) = 24
56 - x - 12 = 24
44 - x = 24
-x = -20
x = 20
Проверка:
56 - (20 + 12) = 56 - 32 = 24
Ответ: x = 20