18=-9(x+9)

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



18=-9(x+9)

We move all terms to the left:

18-(-9(x+9))=0



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

-9(x+9)

We multiply parentheses

-9x-81

Back to the equation:

-(-9x-81)



We get rid of parentheses

9x+81+18=0

We add all the numbers together, and all the variables

9x+99=0

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

9x=-99

x=-99/9

x=-11

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