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if mary's age is x years.what will be the present age of mary's niece if her niece is 3 years less than one third of mary's age 5 years ago?

  • algebra -

    mary's age 5 years ago is x-5
    1/3 of that is (x-5)/3
    3 less than that is (x-5)/3 - 3

    Now, that may not be the answer, since it's difficult to parse just who's how old when, with your unusual verb tenses.

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