15-2f=9

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Solution for 15-2f=9 equation: 


Simplifying
15 + -2f = 9

Solving
15 + -2f = 9

Solving for variable 'f'.

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

Add '-15' to each side of the equation.
15 + -15 + -2f = 9 + -15

Combine like terms: 15 + -15 = 0
0 + -2f = 9 + -15
-2f = 9 + -15

Combine like terms: 9 + -15 = -6
-2f = -6

Divide each side by '-2'.
f = 3

Simplifying
f = 3

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