由①可得x=3y+11所以x-1=3y+10把x-1=3y+10代入②中,得2(3y+10)=5y-8解得y=-28把y=-28代入x=3y+11,可得x=-73
3(y-2)=x-17,3y-6=x-17,3y-x+11=0,6y-2x+22=02(x-1)=5y-8,2x-2=5y-8,2x-5y+6=0,y=-28,x=-73