35 + (72-2x) : 8 = 42 *8
280 + 72 - 2x = 336
-2x=336-280-72
-2x=-16
x=8
Проверка:
35 + (72-2*8) : 8 = 42
42=42
35 + (72 - 2x): 8 = 42
(72-2х):8=42-35
(72-2х):8=7
72-2х=56
-2х=56-72
-2х=-16
х=8
