f(x)=3x+9x-6

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Solution for f(x)=3x+9x-6 equation: 


Simplifying
f(x) = 3x + 9x + -6

Multiply f * x
fx = 3x + 9x + -6

Reorder the terms:
fx = -6 + 3x + 9x

Combine like terms: 3x + 9x = 12x
fx = -6 + 12x

Solving
fx = -6 + 12x

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -6x-1 + 12

Simplifying
f = -6x-1 + 12

Reorder the terms:
f = 12 + -6x-1

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