1. The problem statement, all variables and given/known data I need to pass a test to get into college calculus, but there's a few things I've forgotten since may, one of them being how to find the inverse of a function with x in the denominator. I think I remember it being something really simple that I'm overlooking, but here it goes: 2. Relevant equations f(x) = (x + 2)/(3x + 5) 1) y = (x + 2)/(3x + 5) 2) x = (y + 2)/(3y + 5) 3) this is where it starts to go crazy. 3. The attempt at a solution My attempts were kind of convulsive, but I hope it'll suffice to say that I know to switch y with x, then solve the problem for y, which will be the inverse. I just don't know how to get y out of the denominator without getting a really complicated answer. (edit: I put what I was saying into math form above) Thanks, if anyone knows this. I've done some re-learning in the past week or so; there are just a few things left that are too specific to find online.