This equation was under the heading "separable equations" and I am supposed to solve it explicitly but I do not see how it is separable since the term cannot be manipulated (in any way I can see) so as to only have functions M(x) and N(y) s.t.

where

Any help would be much appreciated. Can and where x is a constant in N(Y)? but that doesn't make sense because x is not a constant in the equation overall...