9+f=3f-9

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Solution for 9+f=3f-9 equation:


Simplifying
9 + f = 3f + -9

Reorder the terms:
9 + f = -9 + 3f

Solving
9 + f = -9 + 3f

Solving for variable 'f'.

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

Add '-3f' to each side of the equation.
9 + f + -3f = -9 + 3f + -3f

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

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

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

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

Combine like terms: -9 + -9 = -18
-2f = -18

Divide each side by '-2'.
f = 9

Simplifying
f = 9

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