-99=-3(3+6x)

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Solution for -99=-3(3+6x) equation: 



-99=-3(3+6x)

We move all terms to the left:

-99-(-3(3+6x))=0

We add all the numbers together, and all the variables

-(-3(6x+3))-99=0



We calculate terms in parentheses: -(-3(6x+3)), so:

-3(6x+3)

We multiply parentheses

-18x-9

Back to the equation:

-(-18x-9)



We get rid of parentheses

18x+9-99=0

We add all the numbers together, and all the variables

18x-90=0

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

18x=90

x=90/18

x=5

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