81=-8x-3(1+2x)

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Solution for 81=-8x-3(1+2x) equation: 



81=-8x-3(1+2x)

We move all terms to the left:

81-(-8x-3(1+2x))=0

We add all the numbers together, and all the variables

-(-8x-3(2x+1))+81=0



We calculate terms in parentheses: -(-8x-3(2x+1)), so:

-8x-3(2x+1)

We multiply parentheses

-8x-6x-3

We add all the numbers together, and all the variables

-14x-3

Back to the equation:

-(-14x-3)



We get rid of parentheses

14x+3+81=0

We add all the numbers together, and all the variables

14x+84=0

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

14x=-84

x=-84/14

x=-6

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