Hi I am trying to rearrange a differential equation like
$$\frac{dV}{dt}=-\pi y(y-2r) \frac{dy}{dt}$$
I did
$$\frac{dy}{dt}=\frac{\frac{dV}{dt}}{-\pi y(y-2r) }$$
but apparently I am wrong, I can't see why but maybe it's that the equation needs to be in its simplest form
Any help appreciated
:)