20-2f=12

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Solution for 20-2f=12 equation: 


Simplifying
20 + -2f = 12

Solving
20 + -2f = 12

Solving for variable 'f'.

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

Add '-20' to each side of the equation.
20 + -20 + -2f = 12 + -20

Combine like terms: 20 + -20 = 0
0 + -2f = 12 + -20
-2f = 12 + -20

Combine like terms: 12 + -20 = -8
-2f = -8

Divide each side by '-2'.
f = 4

Simplifying
f = 4

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