x²+y+1=0→y=-x²-1①x²-xy-3x=0②①代入②得,x²-x（-x²-1）-3x=0→x³+x²-2x=0→x(x²+x-2)=0→x(x-1)(x+2)=0∴x=1或x=-2亲,希望可以帮到你,有问题欢迎追问我,o(∩_∩)o...