f(12)=x-9

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Solution for f(12)=x-9 equation: 


Simplifying
f(12) = x + -9

Reorder the terms for easier multiplication:
12f = x + -9

Reorder the terms:
12f = -9 + x

Solving
12f = -9 + x

Solving for variable 'f'.

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

Divide each side by '12'.
f = -0.75 + 0.08333333333x

Simplifying
f = -0.75 + 0.08333333333x

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