Реши уравнение: 1) 12y − 7y = 315; 2) (127 − x) : 4 = 24.

1) 12y − 7y = 315 → 5y = 315 → y = 315 ÷ 5 = 63. 2) (127 − x) : 4 = 24 → 127 − x = 24 ⋅ 4 = 96 → x = 127 − 96 = 31.