6,4x+10y-18x-7,4y=32/5x+10y-18x-37/5y=1/5*(32x+10*5y-18*5x-37)y=1/5*(32x+50y-90x-37y)=-1/5*(-58x+13y)
6,4x+10y-18x-7,4y=32/5x+10y-18x-37/5y=1/5*(32x+10*5y-18*5x-37)y=1/5*(32x+50y-90x-37y)=-1/5*(-58x+13y)