Symbolic solutions of an equation in HP 50g

[Emibe]

Hi!, I have been searching a lot about this and I can´t solve my problem. The thing is that I want to solve an ecuation in function of others variables: for example ax+b=0---> x=-b/a. I tried to use the SOLVE function, but it only gives me the result for polynomical or simple ecuations. I wanted to solve for example : a*(x-(24a/24a+b)=c^2/(a(1-x)^2) (solve x in function of a b and c) but it doesn´t give me any result. I study engineering so the ecuations I use are normally not that easy to solve in function of other variables. Is there any solution to this problem? Is there any program that I can add to help with this?. Thanks and i hope that I explained my problem properly, inglish is not my first lenguaje!.