Traveling [tex]m[/tex] miles on this taxi costs
[tex]c=2.5+3.25m[/tex]
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
[tex]2.5+3.25m\leq 61[/tex]
Solving for [tex]m[/tex], we start by subtracting 2.5 from both sides:
[tex]3.25m\leq 58.5[/tex]
Then, we divide both sides by 3.25:
[tex]m\leq 18[/tex]
