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QUESTION
a merchant has coffee worth $30 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound toget a mixture that can be sold for $50 a...
a merchant has coffee worth $30 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound toget a mixture that can be sold for $50 a pound. How may pounds of the $30 coffee should be used?
