将x-y=1代入(x+1)~2/9 - (y-1)~2/4=1后,整理得：55x~2 -44x +68 =0;由此得：x =34/5;或x = 2.将x的值代入x - y =1后,得：y = 29/5; x = 1;所以方程组的解为： x = 34/5, y = 29/5; x = 2,y = 1....