Question

Marta has an easy-pay pass for toll booths in her city. She has $55 remaining after 10 trips through tolls, and $39 after 18 trips through the tolls. How much money is charged per toll? $

Answer 1

Total $ difference divided by trip difference

`$2` per trip

Explanation:

`$55` left after `10` trips
`$39` left after `18` trips

So she has `$55-$39= $16` less
And that in `18-10=8` trips

So if she paid `$16` for `8` trips, she had to pay

`($16)/8=$2`

`$2` per trip