SOLUTION: Set up and solve by either substitution or elimination.
Janet wishes to mix 30 pounds of coffee to sell for $6.00 a pound. To obtain the mixture, she will mmix coffee that sells
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Janet wishes to mix 30 pounds of coffee to sell for $6.00 a pound. To obtain the mixture, she will mmix coffee that sells
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Question 741163: Set up and solve by either substitution or elimination.
Janet wishes to mix 30 pounds of coffee to sell for $6.00 a pound. To obtain the mixture, she will mmix coffee that sells for $5 a pound with coffee that sells for $7 a pound. How many pounds of each type of coffee should she use?
Having a really hard time with this one. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Janet wishes to mix 30 pounds of coffee to sell for $6.00 a pound. To obtain the mixture, she will mmix coffee that sells for $5 a pound with coffee that sells for $7 a pound. How many pounds of each type of coffee should she use?
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Equation:
value + value = value
5x + 7(30-x) = 6*30
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5x + 7*30 - 7x = 6*30
-2x = -1*30
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x = 15 lbs (amt. of $5.00 coffee needed)
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30-x = 15 lbs (amt. of $7.00 coffee needed)
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Cheers,
Stan H.
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