f(5)=x-9

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Solution for f(5)=x-9 equation: 


Simplifying
f(5) = x + -9

Reorder the terms for easier multiplication:
5f = x + -9

Reorder the terms:
5f = -9 + x

Solving
5f = -9 + x

Solving for variable 'f'.

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

Divide each side by '5'.
f = -1.8 + 0.2x

Simplifying
f = -1.8 + 0.2x

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