SOLUTION: The owner wants to create 140 pounds of mixture of peanuts and cashews that he plans on selling for $11.35 per pound. The peanuts sell for $9 per pound and the cashews sell for $12

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Question 755483: The owner wants to create 140 pounds of mixture of peanuts and cashews that he plans on selling for $11.35 per pound. The peanuts sell for $9 per pound and the cashews sell for $12 per pound. How many pounds of each must he mix together to break even.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
This is like a mixture concentration problem in which the concentration is dollars per pound.

p for peanuts
c for cashews

%289%2Ap%2B11.35%2Ac%29%2F140=12 and p%2Bc=140 which should be enough to start.

To continue, 9p%2B11.35c=140%2A12 and c=140-p so substitute,
9p%2B11.35%28140-p%29=140%2A12
9p%2B%2811.35%29%2A140-%2811.35%29%2Ap=140%2A12
and you can continue through this to solve for p, and then go back to solve for c.