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?