To find the number of games Annette's team played last season, we can define \( x \) as the number of games they played last season. According to the problem, the equation that represents the situation is:
\[ 15 = 2x - 7 \]
We can rearrange this to the form \( px + q = r \):
\[ 2x - 7 = 15 \]
So the correct representation of the problem in the required form is:
2x - 7 = 15