F=12+4x

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Solution for F=12+4x equation: 



=12+4F

We move all terms to the left:

-(12+4F)=0

We add all the numbers together, and all the variables

-(4F+12)=0

We get rid of parentheses

-4F-12=0

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

-4F=12

F=12/-4

F=-3

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