{3/x+4/y=2,5x-y=11

问题描述:

{3/x+4/y=2,5x-y=11

y=5x-11
3/x+4/y=2
4x+3y=2xy
4x+3(5x-11)=2x(5x-11)
4x+15x-33=10x^2-22x
10x^2-41x+33=0
x1=3 x2=7/5
那么y1=4 y2=-4