f=-2f-9

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Solution for f=-2f-9 equation: 


Simplifying
f = -2f + -9

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

Solving
f = -9 + -2f

Solving for variable 'f'.

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

Add '2f' to each side of the equation.
f + 2f = -9 + -2f + 2f

Combine like terms: f + 2f = 3f
3f = -9 + -2f + 2f

Combine like terms: -2f + 2f = 0
3f = -9 + 0
3f = -9

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

Simplifying
f = -3

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