SOLUTION: I am trying to find out hwo to work a problem like this one: Find the polar equation for the curve that satisfies the rectangular equation 4x + 3y = 5

You can put this solution on YOUR website!
The equations linking 2d-polar and 2d-cartesian are (learn these!)
and
Substituting these into your equation of a line gives:

polar equations are normally written as so by factoring an and dividing, you should get:

Of course, this isn't valid when you should think about when this happens, and what it means.
Hope that helps,
Kev