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1) Owners of a coffee shop purchased 60 pounds of Guatemalan coffee beans and 90 pounds of Nicaraguan coffee beans. The total purchase price was $180. The next week they purchased 80 pounds of Guatemalan coffee and 20 pounds of Nicaraguan coffee, and the cost was $100. Write and solve a system of equations to find the cost per pound for both the Guatemalan and Nicaraguan coffee beans. ................
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