Question 888756
This also needs a quantity y of the 35% acid solution.


{{{(30x+35y)/5000=31.5}}}  AND {{{x+y=5000}}}.


<a href="http://www.algebra.com/tutors/Mixtures%3A-All-in-Symbols.lesson?content_action=show_dev">Mixing two concentrations for known amount of mixture  http://www.algebra.com/tutors/Mixtures%3A-All-in-Symbols.lesson?content_action=show_dev</a>