Предмет: Математика, автор: Аноним

Помогите решить !

7х-15=5х+5(2х+1)

Ответы

Автор ответа: olay1979
5
7х-15=5х+5(2х+1)
7х-15=5х+10х+5
7х-5х-10х=15+5
-8х=20
 х=-2,5
 ответ: -2,5 
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