Question 1179369
<pre>
                  PRICE            MASS      COST

CASHEWS            $4.5/kg           c        4.5c

PEANUTS            $1.5/kg           p        1.5p

Mixture             $2.61/kg       100 kg     4.5c+1.5p
</pre>
{{{system((4.5c+1.5p)/100=2.61,c+p=100)}}}



{{{4.5c+1.5p=261}}}

{{{4.5(100-p)+1.5p=261}}}

{{{450-4.5p+1.5p=261}}}

{{{-3.0p=261-450}}}

{{{p=(450-261)/3}}}

{{{highlight(p=63)}}}------how much peanuts to use
-
{{{highlight(c=37)}}}-----how much cashews to use


You can find the differences from how many each he started with.