Answer:
The base rental fee is $14.
Explanation:
This problem can be expressed using the equation cost = x + 12t, where x is the base rental fee, 12 is the additional charge per hour, and t is the number of hours.
Substitute 74 for the cost and 5 for t since the cost for this rental is for 5 hours.
74 = x + 12(5)
74 = x + 60
isolate for x by subtracting 60 from both sides.
74-60 = x + 60 - 60
x = 14
Therefore the base rental cost for a bike is $14.