Answer:
Let's say Kiss High School played $x$ games this year, and they won $y$ of those games. We know that they were defeated in $z$ games.
We can represent this information with the equation:
$$y = x - z$$
This equation states that the number of games Kiss High School won ($y$) is equal to the number of games they played ($x$) minus the number of games they lost ($z$).
So, if Kiss High School played 15 games and won most of them, we can substitute $x = 15$ and $z = 2$ into the equation to get:
$$y = 15 - 2 = 13$$
Therefore, Kiss High School won 13 games this year.
Explanation: