So 17 +6 = 23, so lets do 71 divided by 23 to get 3.08.... (let's round the number to 3) So we have 3 hours that the bike was checked out for.
The Equation could be 17+6 divided by 71(If you solve for it then it would look like this 17+6=23 divided by 71= 3 hours
(I'm not 100% sure that all of this is correct but this all makes sense to me. I hope this helps you understand the question and good luck on your assignment.
Good Luck!!