35y=x(y+2)①
50y=x(y-1)②
①/②:
35/50=(y+2)/(y-1)
7/10=(y+2)/(y-1)
10(y+2)=7(y-1)
3y=-27
y=-9
代入(1):35*(-9)=x(-9+2)
x=45
另外x=0,y=0也是方程组的解 35y=x(y+2)①
50y=x(y-1)②
①/②:
35/50=(y+2)/(y-1)
7/10=(y+2)/(y-1)
10(y+2)=7(y-1)
3y=-27
y=-9
代入(1):35*(-9)=x(-9+2)
x=45
另外x=0,y=0也是方程组的解