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March 29, 2017

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A chemist has one solution containing 30% insecticide and another solution containing 50% insecticide. How much of each solution should the chemist mix to get 200 L of a 42% insecticide?

  • math - ,

    .3 x + .5 y = .42(x+y)
    and
    x+y = 200
    so y = (200-x)

    .3 x + .5 (200-x) = 84

    etc

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