f(x)=3-x-12

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Solution for f(x)=3-x-12 equation: 


Simplifying
f(x) = 3 + -1x + -12

Multiply f * x
fx = 3 + -1x + -12

Reorder the terms:
fx = 3 + -12 + -1x

Combine like terms: 3 + -12 = -9
fx = -9 + -1x

Solving
fx = -9 + -1x

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -9x-1 + -1

Simplifying
f = -9x-1 + -1

Reorder the terms:
f = -1 + -9x-1

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