Mathematics, 10.11.2019 22:31, dianasmygova

Amerchant has coffee worth $20 a pound that she wishes to mix with 40 pounds coffee worth $40 a pound to get a mixture that can be sol for $30 a piund. how many pounds of the $20 coffee should be used?

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Amerchant has coffee worth $20 a pound that she wishes to mix with 40 pounds coffee worth $40 a poun...