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1 November, 06:51

I'm picking a number between 1-20. I add 5, then I times the number by 3. Lastly I takeaway it by 15. My answer is 42.

What was my beginning number?

Clue: Do the opposite. 42 ADD 15 ...

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Answers (2)
  1. 1 November, 06:56
    0
    So (x + 5) * 3 - 15 = 42

    so the answer is

    42 + 15 = 15 + 3x

    so solving for x:

    x = 14
  2. 1 November, 07:15
    0
    The number would be 14.
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