-4+7(1+6n)=-81

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Solution for -4+7(1+6n)=-81 equation: 



-4+7(1+6n)=-81

We move all terms to the left:

-4+7(1+6n)-(-81)=0

We add all the numbers together, and all the variables

7(6n+1)-4-(-81)=0

We add all the numbers together, and all the variables

7(6n+1)+77=0

We multiply parentheses

42n+7+77=0

We add all the numbers together, and all the variables

42n+84=0

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

42n=-84

n=-84/42

n=-2

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