A parking garage charges $5 plus $2 per hour. You have $16 to spend for parking. How many hours can

A parking garage charges $5 plus $2 per hour. You have $16 to spend for parking. How many hours can you park?

Subtract the flat rate to get the amount you have for hourly parking:
16 - 5 = 11

So we divide 11 dollars to park by 2 dollars per hour to get:
11/2
5.5 hours