Решите уравнение 3-х+2(5-х)=4х-8
3-х+2(5-х)=4х-8
3-х+10-2х=4х-8
-х-2х-4х=-3-10-8
-7х=-21
х=-21:(-7)
х=3
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-х-2х-4х=-8-10-3