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Let the amount of Kenyan coffee be "K" and the amount of Venezuelan coffee be "V." The K + V = 288, or K = 288 - V.   The cost of the Kenyan coffee will be 11K and the cost of the Venezuelan coffee will be 14 V. The sum of these costs will be 12(288), or                                          ...

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Shawn may have misinterpretted the first term. It is sqrt(3X), not sqrt(3) x X. Therefore, sqrt(3X) + 6 = X               now subtract 6 from each side sqrt(3X) = X - 6               ...