12+f=20

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Solution for 12+f=20 equation: 


Simplifying
12 + f = 20

Solving
12 + f = 20

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 + f = 20 + -12

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

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

Simplifying
f = 8

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