Раскройте скобки: 3х-(5х-(3х-1))

Question

Раскройте скобки:
3х-(5х-(3х-1))

Answer 1

3х-(5х-3х+1)=3х-5х+6х-1=4х-1

Answer 2

3х-(5х-(3х-1))=3х-(5х-3х+1)=3х-2х-1=х-1