f(3x)=2x-3x

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Solution for f(3x)=2x-3x equation: 


Simplifying
f(3x) = 2x + -3x

Remove parenthesis around (3x)
f * 3x = 2x + -3x

Reorder the terms for easier multiplication:
3f * x = 2x + -3x

Multiply f * x
3fx = 2x + -3x

Combine like terms: 2x + -3x = -1x
3fx = -1x

Solving
3fx = -1x

Solving for variable 'f'.

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

Divide each side by '3x'.
f = -0.3333333333

Simplifying
f = -0.3333333333

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