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March 27, 2017

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Hector owns science fiction novels, coming c books, and mystery novels. He has half as many science fiction novels as comic books and he has three times as many mystery novels as comic books. If he owns a totals of 54 books how many of those book are science friction novels?

  • math - ,

    X Comic books.
    X/2 Science fiction.
    3X Mystery novels.

    X + X/2 + 3X = 54,
    Multiply both sides by 2:
    2X + X + 6X = 108,
    9X = 108,
    X = 12,
    X/2 = 6 Science fictions novels.

  • math - ,

    I DON'T KNOW

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