Объяснение:
3х-(5х-(3х-1)=3х-(5х-3х+1)=3х-5х+3х-1=
=х-1
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Объяснение:
3х-(5х-(3х-1)=3х-(5х-3х+1)=3х-5х+3х-1=
=х-1
_______________________