ПОМОГИТЕ РЕШИТЬ 1. Упростите выражения
-0,2(2x-1)+4,2(0,5-8x)
-(m+2n-7)-(-2m-5n+8)
2. Решите уравнения
2(5-3ч)=6-5x
2(1-x)-4(2x+8)=8x+28
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