math

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There are 25 books in a bookcase. The books in the bookcase are all math, science, and history books. Seven of the books are math books. There are 4 fewer science books than history books. How many science books are in the bookcase?

  • math -

    First you need to assign your unknowns
    Math Books: 7
    History: x
    Science Books: x-4
    Total books: 25
    so your equation is going to be
    7+x+x-4=25
    Then you can solve. I hope this help!

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