Question 1201337
Two types nuts:  2.2 $/#, and 9.5 $/#
Mixture wanted:  21.9 # at price  3.6 $/#



v, how much of $9.5/# nuts to use
21.9-v, how much the other nuts to use


{{{9.5v+2.2(21.9-v)=(3.6)(21.9)}}}

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