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7 November, 13:58

When the sum of a number and 3 is subtracted from 13 the result is 7

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Answers (2)
  1. 7 November, 15:40
    0
    The sum of the number is 3. 7+3=10

    13-10=3.
  2. 7 November, 16:15
    0
    13 - (n + 3) = 7

    13 - n - 3 = 7

    10 - n = 7

    10 - n - 7 = 0

    3 - n = 0

    n = 3
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