81=-3(1+4x)

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Solution for 81=-3(1+4x) equation: 



81=-3(1+4x)

We move all terms to the left:

81-(-3(1+4x))=0

We add all the numbers together, and all the variables

-(-3(4x+1))+81=0



We calculate terms in parentheses: -(-3(4x+1)), so:

-3(4x+1)

We multiply parentheses

-12x-3

Back to the equation:

-(-12x-3)



We get rid of parentheses

12x+3+81=0

We add all the numbers together, and all the variables

12x+84=0

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

12x=-84

x=-84/12

x=-7

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