9f=21(12f-2)

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Solution for 9f=21(12f-2) equation: 



9f=21(12f-2)

We move all terms to the left:

9f-(21(12f-2))=0



We calculate terms in parentheses: -(21(12f-2)), so:

21(12f-2)

We multiply parentheses

252f-42

Back to the equation:

-(252f-42)



We get rid of parentheses

9f-252f+42=0

We add all the numbers together, and all the variables

-243f+42=0

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

-243f=-42

f=-42/-243

f=14/81

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