n+(n+12)=84

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Solution for n+(n+12)=84 equation: 



n+(n+12)=84

We move all terms to the left:

n+(n+12)-(84)=0

We get rid of parentheses

n+n+12-84=0

We add all the numbers together, and all the variables

2n-72=0

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

2n=72

n=72/2

n=36

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