User blog comment:Disturbedfan1100/Map Game 1.5 (or 2.5, whatever!)/@comment-26847796-20140305124430/@comment-6812733-20140306154950

In this calculation, y is indeed irrelevant, that's true. But x and y are the first letters used in these kind of calculations. And from what I remember from the math classes, any number that has - before it, is a negative number.

Example: 100 - 50, 50 is the negative number since it has - before it, making it -50.

The same goes when making these kind of calculations: 100 + (50-75) = 100 + -25 = 100 - 25 = 75