Question

Помогите упрастите выражения!

7x-(2y-(4x+(3y-5x)))

m+(3m-(2m-1))

Answer 1

7х-(2у-(4х+(3у-5х)))=7х-(2у-(4х+3у-5х)=7х-(2у-4х-3у+5х)=7х-2у+4х+3у-5х=
=6х+у
m+(3m-(2m-1))=m+(3m-2m+1)=m+3m-2m+1=2m+1