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5 November, 06:49

Tiffany read x/3 books last month. Her brother read (4/9x-15) books and her sister read x/9 fewer books than tiffany. express the total number of books read in terms of x. show your work.

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  1. 5 November, 07:39
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    Tiffany: x/3 books

    Brother: (4/9) x - 15 books

    Sister: x/3 - x/9

    Total: x/3 + (4/9) x - 15 + x/3 - x/9

    The LCD here is 9. Mult. all terms by 9 and simplify the resulting expression:

    3x + 4x - 135 + 3x - x = 7x + 3x - x - 135 = 9x - 135 books (answer)
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