SOLUTION: Coffee worth $ 1.05 per pound is mixed with coffee worth $0.85 per pound to obtain 20 pounds of mixture worth $0.90 per pound. How many pounds of each type of coffee were used?

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Question 950203: Coffee worth $ 1.05 per pound is mixed with coffee worth $0.85 per pound to obtain 20 pounds of mixture worth $0.90 per pound. How many pounds of each type of coffee were used?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Coffee worth $ 1.05 per pound is mixed with coffee worth $0.85 per pound to obtain 20 pounds of mixture worth $0.90 per pound. How many pounds of each type of coffee were used?
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Equation:
value + value = value
1.05x + 0.85(20-x) = 0.90*20
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105x + 85*20 - 85x = 90*20
20x = 5(20)
x = 5 lbs (amt. of $1.05 coffee needed)
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20-x = 15 lbs (amt. of $0.85 coffee needed)
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Cheers,
Stan H.
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