56 - (x + 12) = 24
56 - x - 12 = 244 - x = 2-x = -2x = 20
Проверка56 - (20 + 12) = 56 - 32 = 24
Ответ: x = 20
56 - (x + 12) = 24
56 - x - 12 = 2
44 - x = 2
-x = -2
x = 20
Проверка
56 - (20 + 12) = 56 - 32 = 24
Ответ: x = 20