Question

A car rental company charges a daily rate of ​$21 plus ​$0.20 per mile for a certain car. suppose that you rent that car for a day and your bill​ (before taxes) is ​$105. how many miles did you​ drive?

Answer 1

$ 105 - $ 21 = $84
Per mile = $ 0.20
$84 ÷ $ 0.20 = 420 miles