3x-y-4(y+x)+5(y-3) = 3х-у-4у-4х+5у-15=-х-15
2(y-2x)+4(x-2y)-3(y-1) = 2у-4х+4х-8у-3у+3=-9у+3
y-2(x+2y)+3(y+x)-2= у-2х-4у+3у+3х-2=х-2
3x-y-4(y+x)+5(y-3) = 3х-у-4у-4х+5у-15=-х-15
2(y-2x)+4(x-2y)-3(y-1) = 2у-4х+4х-8у-3у+3=-9у+3
y-2(x+2y)+3(y+x)-2= у-2х-4у+3у+3х-2=х-2
3x-y-4(y+x)+5(y-3) = 3х-у-4у-4х+5у-15=-х-15
2(y-2x)+4(x-2y)-3(y-1) = 2у-4х+4х-8у-3у+3=-9у+3
y-2(x+2y)+3(y+x)-2= у-2х-4у+3у+3х-2=х-2