Пошаговое объяснение:
2х - 1/7 + (5/7 - 2/7) = 23/7 - х
2х - 1/7 + 3/7 = 23/7 - х
2х + 2/7 = 23/7 - х
2х + х = 23/7 - 2/7
3х = 21/7
3х = 3
х = 3 : 3
х = 1
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Пошаговое объяснение:
2х - 1/7 + (5/7 - 2/7) = 23/7 - х
2х - 1/7 + 3/7 = 23/7 - х
2х + 2/7 = 23/7 - х
2х + х = 23/7 - 2/7
3х = 21/7
3х = 3
х = 3 : 3
х = 1