arithmetic

How does this work “Think of a #. Add 7. Double the result. Subtract 8. Double the result. Add 12. Divide by 4. Subtract 6. Your answer will be the original number.

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asked by sam
  1. Think of a #. ---- x
    Add 7 ---- x+7
    Double the result ----- 2x+14
    subract 8 ---- 2x+6
    double the result ---- 4x+12
    add 12 ------ 4x + 24
    divide by 4 ---- x + 6
    subtract 6 ---- x

    Mathemagics!

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    posted by Reiny

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