12=20-4f

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Solution for 12=20-4f equation:


Simplifying
12 = 20 + -4f

Solving
12 = 20 + -4f

Solving for variable 'f'.

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

Add '4f' to each side of the equation.
12 + 4f = 20 + -4f + 4f

Combine like terms: -4f + 4f = 0
12 + 4f = 20 + 0
12 + 4f = 20

Add '-12' to each side of the equation.
12 + -12 + 4f = 20 + -12

Combine like terms: 12 + -12 = 0
0 + 4f = 20 + -12
4f = 20 + -12

Combine like terms: 20 + -12 = 8
4f = 8

Divide each side by '4'.
f = 2

Simplifying
f = 2

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