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j costs twice as much as b. b costs twice as much as k. all three letters together cost 17.50. what is the price of each letter?

  • math -

    b = 2k
    j = 4k

    k + 2k + 4k = 17.50

    7k = 17.50

    k = 17.50/7

    k = 2.50

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