Oceanside Bike Rental ship 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 bike checked out?

8 hours

9*8=72 + 14= 86

9x + 14 = 86

X = 8 hrs.

To find out how many hours Joan paid to have the bike checked out, we need to subtract the base charge of $14 from the total amount she paid, which is $86.

Let's assume Joan rented the bike for x hours. According to the given information, the charge for renting a bike is $9 per hour. So, the equation to represent the situation is:
14 + 9x = 86

To solve this equation, we can start by subtracting 14 from both sides to isolate the variable:
9x = 86 - 14
9x = 72

Next, we divide both sides of the equation by 9 to solve for x:
x = 72 / 9
x = 8

Therefore, Joan paid to have the bike checked out for 8 hours.