f-f=0

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Solution for f-f=0 equation:


f-f=0

We simplify the equation to the form, which is simple to understand 
f-f=0

We move all terms containing f to the left and all other terms to the right. 
+1f-1f=0

We simplify left and right side of the equation. 
f=0

0=0

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

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