oceanside bike rental shop changes 18 dollars plus 6 dollars an hour for renting a bike. sally paid 48 dollars to rent a bike. how many hours did she pay to have the bike checked out?

Answer 1

48 = 18 + 6H

6H = 48-18 = 30

H = 30/6 = 5 hours

Answer 2

I. Let's re frame the question

Sally paid $48. She had to pay $18 no matter how many hours she rode on the bike.

So we are talk about $30 (= $48-$18) that we are not sure how it is spent.

II. For every hour on the bike, Sally spends $6

For 1 hour on the bike, sally pays for $6

For 2 hours on the bike, sally pays for $12

.. 3 .... ... ... , ... ... ... $18

and etc

A division can help us to know how many hours Sally has spent on the bike.

$30/$6= 5 for 5 hours

III. To put it in an equation,

18+ 6t= 48, where t is the number of hours Sally rode on the bike.

To solve this equation, we subtract 18 from both sides.

6t= 30

Then divide by 6

t= 5

Sally paid 5 hours to be on the bike.