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algebra

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I rent out 2/5 of my books, give 3 away, buy 9 and now have 27. How many did I start with - I know it's 35 but I can't make the formula work

  • algebra - ,

    let X be the number you start with.

    3X/5 -3 +9 = 27

    3X/5 = 21

    3X = 105

    I don't see a problem getting 35.

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