4х - 5 = 8 5х - 2х + 4 = 8
4х = 8 + 5 5х - 2х = 8 - 4
4х = 13 3х = 4
х = 13/4 х = 4/3
х = 3 целых 1/4 х = 1 целая 1/3
х = 3,25 - - - - - - - - - - - - -
- - - - - - - - - - - - Проверка:
Проверка: 5 · 4/3 - 2 · 4/3 + 4 = 8
4 · 3,25 - 5 = 8 20/3 - 8/3 + 4 = 8
13 - 8 = 5 12/3 + 4 = 8
5 = 5 - верно 4 + 4 = 8 - верно
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4х - 5 = 8 5х - 2х + 4 = 8
4х = 8 + 5 5х - 2х = 8 - 4
4х = 13 3х = 4
х = 13/4 х = 4/3
х = 3 целых 1/4 х = 1 целая 1/3
х = 3,25 - - - - - - - - - - - - -
- - - - - - - - - - - - Проверка:
Проверка: 5 · 4/3 - 2 · 4/3 + 4 = 8
4 · 3,25 - 5 = 8 20/3 - 8/3 + 4 = 8
13 - 8 = 5 12/3 + 4 = 8
5 = 5 - верно 4 + 4 = 8 - верно