Question 989409
p quantity of pecan
w quantity of walnuts
p+w=40
w=40-p.


Try this using ONE variable.
{{{(5p+5.8(40-p))/40=5.5}}}
and solve for p.


Here is a video using the same idea but a different EXAMPLE:
<a href="https://www.youtube.com/watch?v=-REjxT9KCzQ">two part mixture for price using one single variable</a>