3) 13(x + 6) - 72 = 12313x + 78 - 72 = 12313x + 6 = 12313x = 117x = 117 / 13x = 9
Ответ: x = 9
4) 77 + 8*(x - 5) = 12577 + 8x - 40 = 1258x + 37 = 1258x = 88x = 88 / 8x = 11
Ответ: x = 11
3) 13(x + 6) - 72 = 123
13x + 78 - 72 = 123
13x + 6 = 123
13x = 117
x = 117 / 13
x = 9
Ответ: x = 9
4) 77 + 8*(x - 5) = 125
77 + 8x - 40 = 125
8x + 37 = 125
8x = 88
x = 88 / 8
x = 11
Ответ: x = 11