Решите уравнение
1)8,1-(3,1-y)=1
2)9,4+(8,6-x)=0,4
3)0,6(x+7)-0,5(x-3)=6,8
4)0,3(x-2)-0,2(x+4)=0,6
5)-7(0,3x-8)+3(0,4x+5)=8
6)0,87x-0,9x+1,3x=-15,24
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