Question

(x-12)x8=56 с проверкой

Answer 1

х-12 = 56 :8
х-12 = 7
х = 12+7
х=19
проверка:
19 - 12 = 56 : 8
    7  = 7

Answer 2

х-12=56:8
х-12=7
х=12+7
х=19
проверка: (19-12)*8=56