f(12)=12-9

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


Simplifying
f(12) = 12 + -9

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

Combine like terms: 12 + -9 = 3
12f = 3

Solving
12f = 3

Solving for variable 'f'.

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

Divide each side by '12'.
f = 0.25

Simplifying
f = 0.25

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