(3x+9)=(6x-12)

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Solution for (3x+9)=(6x-12) equation: 



(3x+9)=(6x-12)

We move all terms to the left:

(3x+9)-((6x-12))=0

We get rid of parentheses

3x-((6x-12))+9=0



We calculate terms in parentheses: -((6x-12)), so:

(6x-12)

We get rid of parentheses

6x-12

Back to the equation:

-(6x-12)



We get rid of parentheses

3x-6x+12+9=0

We add all the numbers together, and all the variables

-3x+21=0

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

-3x=-21

x=-21/-3

x=+7

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