So all we have to do at this point is solve for the derivative of y with respect to x, solve this equation. So let's do that. And actually, just so we all, so we can do this whole thing on the same page so we can see where we started, let me copy and paste this up here. This is where we left off, and let's continue there. So let's say, let's subtract two x from both sides. So we're left with two y times the derivative of y with respect to x is equal to, we're subtracting two x from both sides, so it's equal to negative two x. And then if we really want to solve for the derivative of y with respect to x, we can just divide both sides by two y.