Question 61618
4ux+20u+vx+5v, if it factors, has u, x, v, and some constants in it (because of the 4, 5, and 20.

So, it might factor like this: (Cu+v)(x+D) where C and D are constants. This is so  you can get things in terms of ux, u, vx, and v.

In fact, the terms do factor like this: (4u+v)(x+5)