5(x-3y)=2x+27 3(x-6y)=9y+15 5(x-3y)=2x+27 3x-15y-27=0 y=0.2x-1.8 3(x-6y)=9y+15 3x-27y-15=0 3x-27*(0.2x-1.8)-15=0 3x-5.4x+48.6-15=0 -2.4x+33.6=0 x=33.6/2.4 x=14 3x-15y-27=0 3*14-15y-27=0 15-15y=0 y=15/15 y=1