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30 September, 11:36

When I think of a number, double it, then add seven, I get 25. what number did I think of?

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Answers (2)
  1. 30 September, 12:20
    0
    9

    Step-by-step explanation:

    25-7=18

    half of 18 is 9
  2. 30 September, 14:44
    0
    9

    Step-by-step explanation:

    let the number be x

    double it = x+x = 2x

    then add seven = 2x+7

    i get 25 2x+7 = 25

    subtract 7 from both sides

    2x = 25-7 = 18

    2x = 18

    x = 18/2 = 9
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