0=f+9

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Solution for 0=f+9 equation:


Simplifying
0 = f + 9

Reorder the terms:
0 = 9 + f

Solving
0 = 9 + f

Solving for variable 'f'.

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

Add '-1f' to each side of the equation.
0 + -1f = 9 + f + -1f
Remove the zero:
-1f = 9 + f + -1f

Combine like terms: f + -1f = 0
-1f = 9 + 0
-1f = 9

Divide each side by '-1'.
f = -9

Simplifying
f = -9

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