Answer:
5x + 2.50 - 0.2
Explanation:
The 5x is because each game (x) costs 5 dollars. You add 2.50 because that is how much extra you have to pay for the bowling shoes. To compensate for the -20% off of the total price, I added the -0.2 (20% as a decimal).
Note:
I am 100% sure about the "5x + 2.50 -" part. The 0.2 part not so much.
I hope this is correct and helps though!