1. The problem statement, all variables and given/known data Solve xy' = y + xe^(y/x) using the substitution v=(y/x) 2. Relevant equations Solving differential equations, substitution 3. The attempt at a solution x (dy/dx) = y + xe^(y/x) (dy/dx) = (y/x) + e^(y/x) Substituting v=(y/x) (dy/dx) = v + e^(v) I do not know how to proceed from here. (There are so many variables that aren't x and y! Ahh) Any guidance would be greatly appreciated!