To solve this problem, we need to express it in the form of the equation \( px + q = r \).
Let \( x \) represent the number of games Annette's soccer team played last season. According to the problem, the number of games they played this season (15 games) is 7 games fewer than 2 times the number of games they played last season.
This can be expressed as:
\[ 2x - 7 = 15 \]
So, the correct representation of the problem in the form \( px + q = r \) is:
2x - 7 = 15.