Answer:
7 hours
Step-by-step explanation:
The hourly charge was $66 -17 = $49. That charge was $7/hour so Mike had the bike for ...
$49/($7/hour) = 7 hours.
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You could write an equation for the total charge, then set it equal to 66 and find the solution that way. For h hours, the charge is ...
charge = 17 + 7h
66 = 17 +7h
49 = 7h . . . . . . . . maybe this looks familiar
49/7 = h = 7 . . . . divide by the coefficient of h
Mike had the bike for 7 hours.
