9-4f=3f-12

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Solution for 9-4f=3f-12 equation:


Simplifying
9 + -4f = 3f + -12

Reorder the terms:
9 + -4f = -12 + 3f

Solving
9 + -4f = -12 + 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 + -4f + -3f = -12 + 3f + -3f

Combine like terms: -4f + -3f = -7f
9 + -7f = -12 + 3f + -3f

Combine like terms: 3f + -3f = 0
9 + -7f = -12 + 0
9 + -7f = -12

Add '-9' to each side of the equation.
9 + -9 + -7f = -12 + -9

Combine like terms: 9 + -9 = 0
0 + -7f = -12 + -9
-7f = -12 + -9

Combine like terms: -12 + -9 = -21
-7f = -21

Divide each side by '-7'.
f = 3

Simplifying
f = 3

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