Question

s-2/2-s-1/5=1/4

Answer 1

If you mean it the way you typed it ...

s - 1 - s - 1/5 = 1/4
-1 - 1/5 = 1/4 , which is nonsense, so there is no solution

If you mean
(s-2)/(2-s) - 1/5 = 1/4
-1 - 1/5 = 1/4, which again is nonsense,

better check your equation or your typing