Ответ:
1)5х+3х+7=8х+7
2)8а+1-3а=5а+1
3)-у+у-1=-1
4)-5m+(-m)-n=-6m-n
5)2х-3у+(-у-х)=х-4у
6)1,5а²+2b²+2a²-2b²=3,5a²+b²
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Ответ:
1)5х+3х+7=8х+7
2)8а+1-3а=5а+1
3)-у+у-1=-1
4)-5m+(-m)-n=-6m-n
5)2х-3у+(-у-х)=х-4у
6)1,5а²+2b²+2a²-2b²=3,5a²+b²