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A store mixes Brazilian coffee worth $11 per kilogram and Venezuelan coffee worth $15 per kilogram. The mixture is to sell for $14 per kilogram. Find how much of each is needed to to make a 216-kilogram mixture.

Brazilian coffee needed-

Venezuelan coffee needed-

  • algebra -

    11B + 15V = 14(B+V)
    B+V = 216

    11B + 15(216-B) = 14*216
    B = 54
    V = 162

    check:
    11*54 + 15*162 = 3024 = 14*216

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