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29 October, 22:42

Twice the difference of a number and 9 is 5

Use the variable c for the unknown number.

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Answers (1)
  1. 29 October, 23:27
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    C = 11.5

    Step-by-step explanation:

    1. (c - 9) 2 = 5

    2. 2c - 18 = 5

    3. 2c = 23

    4. c = 11.5
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