(12x+6)=(21x+9)

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Solution for (12x+6)=(21x+9) equation: 



(12x+6)=(21x+9)

We move all terms to the left:

(12x+6)-((21x+9))=0

We get rid of parentheses

12x-((21x+9))+6=0



We calculate terms in parentheses: -((21x+9)), so:

(21x+9)

We get rid of parentheses

21x+9

Back to the equation:

-(21x+9)



We get rid of parentheses

12x-21x-9+6=0

We add all the numbers together, and all the variables

-9x-3=0

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

-9x=3

x=3/-9

x=-1/3

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