Question 805613
6 pounds Brand A, p dollars per pound.
4 pounds Brand B, 1.23 dollars per pound.
10 pounds mixture, 11.50 dollars per pound target price.


{{{(6p+4*(1.23))/10=11.50}}}


The worded description may seem complicated if you are unaccustomed to price & cost descriptions, but that is the specific fractional equation fitting the description.  Solve for p.    
 Mr. Lavalle does not want to pay more than price p for Brand A.