f(x)=f(x)

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Solution for f(x)=f(x) equation: 


Simplifying
f(x) = f(x)

Multiply f * x
fx = f(x)

Multiply f * x
fx = fx

Add '-1fx' to each side of the equation.
fx + -1fx = fx + -1fx

Combine like terms: fx + -1fx = 0
0 = fx + -1fx

Combine like terms: fx + -1fx = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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