Respostas

2014-08-24T08:51:23-03:00
2014-08-24T08:53:00-03:00
X=(2y+1)/(1+y) ---->(1+y)·x=2y+1---->x+yx-2y=1 ---->y·(x-2)=1-x---->y=(1-x)/(x-2)