-7(-3n-6)=126

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Solution for -7(-3n-6)=126 equation: 



-7(-3n-6)=126

We move all terms to the left:

-7(-3n-6)-(126)=0

We multiply parentheses

21n+42-126=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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