Lottie Lynn is Eurogamer's Guides Editor. She likes exploring new games and still has nightmares about the moon from Majora's Mask.

Equations that have more than one unknown can have an infinite number of solutions. For example, \(2x + y = 10\) could be solved by: \(x = 1\) and \(y = 8\) \(x = 2\) and \(y = 6\) \(x = 3\) and \(y = ...