1. The problem statement, all variables and given/known data I have to solve (y^2)(y'')=y' using substitution. 2. Relevant equations 3. The attempt at a solution I substituted in v for y' and v*(dv/dy) for y'' and then I got stuck at dy/dx=-1/y+C. Am I doing this wrong, or am I just missing how to solve that second equation?