F(X)=12x-9.

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Solution for F(X)=12x-9. equation: 



(F)=12F-9.

We move all terms to the left:

(F)-(12F-9.)=0

We add all the numbers together, and all the variables

F-(12F-9)=0

We get rid of parentheses

F-12F+9=0

We add all the numbers together, and all the variables

-11F+9=0

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

-11F=-9

F=-9/-11

F=9/11

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