-81=3(6x+3)

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Solution for -81=3(6x+3) equation: 



-81=3(6x+3)

We move all terms to the left:

-81-(3(6x+3))=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-9-81=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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