A mixture of 5 pounds of fertilizer A, 13 pounds of fertilizer B, and 4 pounds of fertilizer C provides the optimal nutrients for a plant. Commercial brand X contains equal parts of fertilizer B and fertilizer C. Commercial brand Y contains one part of fertilizer A and two parts of fertilizer B. Commercial brand Z contains two parts of fertilizer A, five parts of fertilizer B, and two parts of fertilizer C. How much of each fertilizer brand is needed to obtain the desired mixture?

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Q: fruit grower can use two types of fertilizer in her orange grove, brand A or brand B. The amounts…

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Q: A farmer can buy two types of plant food, mix A and mix B. Each cubic yard of mix A contains 20…

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