f(9)=2x-4

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Solution for f(9)=2x-4 equation: 


Simplifying
f(9) = 2x + -4

Reorder the terms for easier multiplication:
9f = 2x + -4

Reorder the terms:
9f = -4 + 2x

Solving
9f = -4 + 2x

Solving for variable 'f'.

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

Divide each side by '9'.
f = -0.4444444444 + 0.2222222222x

Simplifying
f = -0.4444444444 + 0.2222222222x

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