Ответ:
1) y=12
2)x=26
Пошаговое объяснение:
1) (76 - 5y)*3 + 56 = 104
(76 - 5y)*3 = 104 - 56
(76 - 5y)*3 = 48
76 - 5y = 48 / 3
76 - 5y = 16
-5y = 16 - 76
-5y = -60
y = 12
2) 20*(24 + x) = 1612 - 612
20*(24 + x) = 1000
24 + x = 1000 / 20
24 + x = 50
x = 50 – 24
x = 26