a) 6m+5n-4n-4m+3n+m= 3m+4n
б) 7m+6n-5n-8m+3n+m=4n
в)7х-8у+9у-5х+6=2x-1y+6
г)3х-5у+7у-2х+4=x-2y+4
д)3(2х-3у)+9(у-4х)=6x-9y+9y-4x=2x
е)7(2х-3у)-3(4х+2у)=14x-21y-12x-6y=2x-27y
a) 6m+5n-4n-4m+3n+m= 3m+4n
б) 7m+6n-5n-8m+3n+m=4n
в)7х-8у+9у-5х+6=2x-1y+6
г)3х-5у+7у-2х+4=x-2y+4
д)3(2х-3у)+9(у-4х)=6x-9y+9y-4x=2x
е)7(2х-3у)-3(4х+2у)=14x-21y-12x-6y=2x-27y