F(12)=3(x-7)

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Solution for F(12)=3(x-7) equation: 



(12)=3(F-7)

We move all terms to the left:

(12)-(3(F-7))=0



We calculate terms in parentheses: -(3(F-7)), so:

3(F-7)

We multiply parentheses

3F-21

Back to the equation:

-(3F-21)



We get rid of parentheses

-3F+21+12=0

We add all the numbers together, and all the variables

-3F+33=0

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

-3F=-33

F=-33/-3

F=+11

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