Traveling
miles on this taxi costs
In fact, we spend 2.50 no matter what, and then we add 3.25 (i.e. the cost of a mile) multiplied by the number of miles.
This quantity has to be less than or equal to 61, so we have
Solving for
, we start by subtracting 2.5 from both sides:
Then, we divide both sides by 3.25: