整理方程①3﹙x+y﹚=36-2﹙x-y﹚3x+3y=36-2x+2y3x+3y+2x-2y=365x+y=36③整理方程②4x+4y-5x+5y=2-x+9y=2x=9y-2④④代入③,得5﹙9y-2﹚+y=3645y-10+y=3646y=46∴y=1把y=1代入④,得x=7∴x=7,y=1