mx-y=m x+my=m-1
问题描述:
mx-y=m x+my=m-1
求x,
答
mx-y=m(1)
x+my=m-1(2)
(1)*m+(2)
m^2x+x=m^2+m-1
x=(m^2+m-1)/(m^2+1)
y=mx-m=m(x-1)=(m^2-2m)/(m^2+1)