A skateboarding park charges $7 per session to skate and $4 per session to rent safety equipment. Your friend rents safety equip
ment every time he skates. Last year, he spent $99 total for skating charges and equipment rentals. How much did he pay to rent safety equipment last year? Please explain!
He spent $36 on safety equipment. The total cost each time was $11, meaning he had to pay 9 times for each skate session. 4x9=36! ( 7x9= 63 so if you add 36 you'll get 99 just as a way of checking)
