Question 956491
This can be solved using only one variable, but here is a lesson for solving the type of problem using two variables:


<a href="http://www.algebra.com/my/Mixtures%3A-All-in-Symbols.lesson?content_action=show_dev">two-part mixture, find both quantities</a>
http://www.algebra.com/my/Mixtures%3A-All-in-Symbols.lesson?content_action=show_dev