12+5f-2f=9

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Solution for 12+5f-2f=9 equation: 


Simplifying
12 + 5f + -2f = 9

Combine like terms: 5f + -2f = 3f
12 + 3f = 9

Solving
12 + 3f = 9

Solving for variable 'f'.

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

Add '-12' to each side of the equation.
12 + -12 + 3f = 9 + -12

Combine like terms: 12 + -12 = 0
0 + 3f = 9 + -12
3f = 9 + -12

Combine like terms: 9 + -12 = -3
3f = -3

Divide each side by '3'.
f = -1

Simplifying
f = -1

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