How many pounds lb of the 30 coffee should be
A merchant has coffee worth $30 a pound that she wishes to mix with 80 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. How many pounds (lb) of the $30 coffee should be used?
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a merchant has coffee worth 30 a pound that she wishes to mix with 80 pounds of coffee worth 90 a pound to get a
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