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Ответ

Ответ дан
missFr
2х+10-Х-25=0 Приводим подобные
Х-15=0
х=15

Ответ

Ответ дан
FergieI
2(x+5)-(x+25)=0
2x+2*5-x-25=0
2x-x=25-10
x=15

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