F=9+3x

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Solution for F=9+3x equation: 



=9+3F

We move all terms to the left:

-(9+3F)=0

We add all the numbers together, and all the variables

-(3F+9)=0

We get rid of parentheses

-3F-9=0

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

-3F=9

F=9/-3

F=-3

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