1. The problem statement, all variables and given/known data Find y' if x5y=y2x. 2. Relevant equations d(ln y)=dy/y. 3. The attempt at a solution I know this involves the natural log, and I suspect I am supposed to take the ln of both sides in order to pop the exponents down in front, and then use d(ln y)=dy/y. But I can't really complete the thought. It's been a while!