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Mathematics, 30.06.2019 15:00 kaylabustos10

Mike has coffee worth $4 per pound that he wishes to mix with 20 pounds of coffee worth $7 per pound to get a mixture that can be sold for $5 per pound. how many pounds of the cheaper coffee should he use?

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Mike has coffee worth $4 per pound that he wishes to mix with 20 pounds of coffee worth $7 per pound...
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