5 ( х + 3 ) - 2 ( 5 + х ) = 15 ( х + 4 )
5х + 15 - 10 - 2х = 15х + 60
5х - 2х - 15х = 60 - 15 + 10
-12х = 55
х = -55/12 = -4 7/12.
Ответ : х = - 4 7/12.
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5 ( х + 3 ) - 2 ( 5 + х ) = 15 ( х + 4 )
5х + 15 - 10 - 2х = 15х + 60
5х - 2х - 15х = 60 - 15 + 10
-12х = 55
х = -55/12 = -4 7/12.
Ответ : х = - 4 7/12.
___________________________
Удачи)