Question 1055389
If you can understand this one: <a href="https://www.algebra.com/algebra/homework/word/travel/Travel_Word_Problems.faq.question.1055391.html">https://www.algebra.com/algebra/homework/word/travel/Travel_Word_Problems.faq.question.1055391.html</a>
then this question #1055389 is the same thing, but just another example.  Both of these examples work the same way.