So, what I wanna do is I wanna get the parts that involve w onto the left-hand side. And I wanna get anything that deals with dt on the right-hand side. So, let's divide both sides of this equation by w minus 300. So, we would have one over w minus 300, dw dt, the derivative of w with respect to t, is equal to, well, I divided this side by w minus 300, so it's equal to one over 25. Now, I wanna get the dt's on this side, so let's multiply both sides by dt. View the differential as just a very, very small change in t. And so, we get, and I'm a little bit imprecise with my notation here, but this is one way that you can think about it when you are dealing with differential equations like this, separable differential equations. You have one over w minus 300, dw, let me make sure that the dw doesn't look like it's in the denominator, dw, is equal to one over 25 dt.