Set up a system of equations describing the following word problem. Be sure to specify what each variable represents.
A forest inhabited only by borogoves and mome raths contains eighty-two creatures. Borogoves are two-legged animals, while a mome rath has 4 legs. Sorry, we were getting bored of cats and birds.
If the forest contains a total of 234 legs, how many borogoves and how many mome raths live in the forest?