(2х+3)+(3х+4)+(5х+5)=12-7х
(2х + 3) + (3х + 4) + (5х + 5) = 12 - 7х 2х + 3 + 3х + 4 + 5х + 5 = 12 - 7х 10 х + 12 = 12 - 7х17х = 0х = 0 Ответ : 0
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(2х + 3) + (3х + 4) + (5х + 5) = 12 - 7х
2х + 3 + 3х + 4 + 5х + 5 = 12 - 7х
10 х + 12 = 12 - 7х
17х = 0
х = 0
Ответ : 0