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Soybean meal is 14% protein; cornmeal is 7% protein. How many pounds of each should be mixed together in order to get 280-lb mixture that is 10% protein?

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2 answers
  1. .14s + .07(280-s) = .10*280
    .14s + 19.6 - .07s = 28
    .07s = 8.4
    s = 120

    so, use 120 lbs of soybean and 160 lbs of corn

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  2. x+y=2
    y-x=2

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