пожалуиста до обеда!
1)8y-3(2y-3)=7y-2(5y+8)
2)5(2y-9)+6y=4(3y-2)-21
3)5y+7(3-y)=3(5-2y)-6
4)7y-4(3y+5)=2-3(4y-9)
1)8y-3(2y-3)=7y-2(5y+8)
2)5(2y-9)+6y=4(3y-2)-21
3)5y+7(3-y)=3(5-2y)-6
4)7y-4(3y+5)=2-3(4y-9)
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