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Math Help - Finding #(#x)

  1. #1
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    Finding #(#x)

    For all numbers x, let #x be defined as #x=-x+1. Which of the following is equal to #(#x)? The answer is x.

    I tried it out by moving the x over to find that (-x+1)/x = # but I got stuck going down that way and don't know how they got x by itself.

    Help please.
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  2. #2
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    \#(x) = -x + 1

    so

    \#(\#x) = -(\#x) + 1

     = -(-x + 1) + 1

     = x - 1 + 1

     = x.
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  3. #3
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    Quote Originally Posted by Prove It View Post
    \#(x) = -x + 1

    so

    \#(\#x) = -(\#x) + 1

     = -(-x + 1) + 1

     = x - 1 + 1

     = x.
    Doh! Thank you. Man, I'm embarrassed at how easy that was.
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