# Math Help - Finding #(#x)

1. ## 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.

2. $\#(x) = -x + 1$

so

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

$= -(-x + 1) + 1$

$= x - 1 + 1$

$= x$.

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

so

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

$= -(-x + 1) + 1$

$= x - 1 + 1$

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