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. We just divide both sides by two y. And we are left with the derivative of y with respect to x. Let's scroll down a little bit.