Thanks...

I got this homogeneous equation:

(2.r - s)ds + (r - 2.s)dr = 0

y = 2+s

x = r-1

Made this subtitution:

t = r/s

dr = s.dt + t.ds

And got this:

ds/s = (2-t).dt/tē-1

The integration leads me to a complicated and large answer, is there any better options here?