6x+18=-2(3x+9)

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Solution for 6x+18=-2(3x+9) equation: 



6x+18=-2(3x+9)

We move all terms to the left:

6x+18-(-2(3x+9))=0



We calculate terms in parentheses: -(-2(3x+9)), so:

-2(3x+9)

We multiply parentheses

-6x-18

Back to the equation:

-(-6x-18)



We get rid of parentheses

6x+6x+18+18=0

We add all the numbers together, and all the variables

12x+36=0

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

12x=-36

x=-36/12

x=-3

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