Автор - bejanvladik

Решите уравнение 3x+5+(x+5)=(1-x)+4

Ответ

Автор - Хелем
3х+5+(х+5)=(1-х)+4
3х+5+х+5=1-х+4
3х+5+х+5-1+х-4=0
5х+5=0
5х=-5
х=-1

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