Question 934569
A similar problem was asked/answered here


<a href="http://www.algebra.com/algebra/homework/word/travel/Travel_Word_Problems.faq.question.160404.html">http://www.algebra.com/algebra/homework/word/travel/Travel_Word_Problems.faq.question.160404.html</a>


The conclusion is that it is impossible to do so (the solver explains why). Let me know if that helps or not. Thanks.