f(x)=x-x-12

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Solution for f(x)=x-x-12 equation: 


Simplifying
f(x) = x + -1x + -12

Multiply f * x
fx = x + -1x + -12

Reorder the terms:
fx = -12 + x + -1x

Combine like terms: x + -1x = 0
fx = -12 + 0
fx = -12

Solving
fx = -12

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Divide each side by 'x'.
f = -12x-1

Simplifying
f = -12x-1

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