Answer:
6 hours
Step-by-step explanation:
Let n represent the number of hours, then 19n is hourly rental charge
60 + 19n = 178 ← models the situation
Subtract 60 from both sides
19n = 118 ( divide both sides by 19 )
n = 6.210526316..., that is
The greatest number of hours she can rent the car for is 6
