Question

 A taxi service charges a flat fee of $1.25 and $0.75 per mile. If Henri has $14.00, which of the following shows the number of miles he can afford to ride in the taxi?

Answer 1

Flat fee:  $1.25; cost per mile:  $0.75.  Cost per x miles:  ($0.75)x.

Therefore:  $14 = $1.25 + $0.75x.  Solve this for x:

$12.75 = $0.75x.  Divide both sides by $0.75:    x = $12.75 / $0.75 = 17

He can afford to ride up to 17 miles in the taxi.