20=6+2f

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Solution for 20=6+2f equation: 



20=6+2f

We move all terms to the left:

20-(6+2f)=0

We add all the numbers together, and all the variables

-(2f+6)+20=0

We get rid of parentheses

-2f-6+20=0

We add all the numbers together, and all the variables

-2f+14=0

We move all terms containing f to the left, all other terms to the right

-2f=-14

f=-14/-2

f=+7

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