Answer: There are 4 hours at which the charges for Shawn's Rentals the same as the charges for Darla's Surf Shop.
Explanation:
Since we have given that
Rental charges for Shawn per hour = $27.50
Rental charges for Darla per hour = $23.25
Extra charge for a wetsuit = $17
Let the number of hours be 'x'.
According to question,
Shawn's equation would be

Darla's equation would be

Since he charges for Shawn's Rentals the same as the charges for Darla's Surf Shop:
So, it becomes

Hence, there are 4 hours at which the charges for Shawn's Rentals the same as the charges for Darla's Surf Shop.