Answer
$f(x) = x + 1$ and $g(x) = x -1$
Work Step by Step
Let $f(x) = x + 1$ and $g(x) = x -1$:
$$f(g(x)) = (x -1) +1 = x$$$$g(f(x)) = (x +1) -1 = x$$
Therefore, $f(g(x)) = g(f(x))$
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