Intro Calculus question/algebra, school me please

[Andrew]

Yes Joe right on the money.

Yes WSSix it does indeed. I'm using a buddies test as a study guide. He got perfect on the question so I'm assuming the prof missed the error or just overlooked the clerical as it was irrelevant to the process. It had me tripped up for a good little bit though. Well enough to try and brush up on my algebra and try and figure out what magic was worked that I was missing. I was thinking factoring or some crazy trick I had never seen before. It's funny how easy it is to overlook the obvious when it's staring you right in the face.

Thanks for the help guys,