If you can, on one side of this equation, through algebra, separate out the y's and the d y's, and on the other side, have all the x's and d x's, and then integrate, perhaps you can find the particular solution to this differential equation that contains this point. Now if you can't do it, don't worry, because we're about to work through it. So as I said, let's use a little bit of algebra to get all the y's and d y's on one side, and all the x's and d x's on the other side. So one way, let's say I want to get all the y's and d y's on the left hand side, and all the x's and d x's on the right hand side. Well I can multiply both sides times y. So I can multiply both sides times y. That has the effect of putting the y's on the left hand side.