Solution:
Note that:
- 1 game played = 5.2 + 7.3 minutes
- Trial lasting = 60 minutes
Finding how much levels for free.
- x games = 5.2 + 7.3x = 60 minutes
- => 7.3x = 54.8 minutes
- => x ≈ 7.51
Round it down to find the exact number of free levels you can play.
We can play 7 levels for free.