Oceanside bike rental shop charges 14 dollars plus 9 dollars an hour for renting a bike. joan paid 86 dollars to rent a bike. how many hours did she pay to have the biked checked out?

Joan paid for 8 hours of biking rental because 9*8=72 + the original 14 for the bike is 86 dollars.

An equation would look something like 14+9a=86

$14 initial fee plus $9 per hour for a total of $86

So subtract 14 from each side of the equation to leave you 9a=72

Divide each side by 9, leaving x=8

8 hours