You say "this equation". Looks to me like you have two equations. The place to start is to decide what you are after with what you have. Are you trying to solve for x, for y or for both? Possibly, you want to graph one or both of them. Maybe you are trying to restate one or both as a function of x or as a function of y. Just what are you after? When responding, please show us what you have done so far.