-3(1-7n)=81

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Solution for -3(1-7n)=81 equation: 



-3(1-7n)=81

We move all terms to the left:

-3(1-7n)-(81)=0

We add all the numbers together, and all the variables

-3(-7n+1)-81=0

We multiply parentheses

21n-3-81=0

We add all the numbers together, and all the variables

21n-84=0

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

21n=84

n=84/21

n=4

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