SOLUTION: andrea sells each pack of mixed nuts for 6 pesos per gram. each gram of peanuts and cashews nuts cost 3 pesos and 8 pesos respectively. if she needs to have a mixture of 120 grams.

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Question 815454: andrea sells each pack of mixed nuts for 6 pesos per gram. each gram of peanuts and cashews nuts cost 3 pesos and 8 pesos respectively. if she needs to have a mixture of 120 grams. how many grams of each nuts should she mix?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Mixture, 6 pes/g
peanuts, 3 pes/g
cashews, 8 pes/g
Want 120 g of mixture
Let u = grams of peanuts
Let v = grams of cashews

This is a two part mixture problem and the prices are like concentrations.

%283u%2B8v%29%2F120=6 and u%2Bv=120
More than half of the problem is to analyze and formulate those two equations.
Solve for u and v.