3n+84=12n+12

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Solution for 3n+84=12n+12 equation: 



3n+84=12n+12

We move all terms to the left:

3n+84-(12n+12)=0

We get rid of parentheses

3n-12n-12+84=0

We add all the numbers together, and all the variables

-9n+72=0

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

-9n=-72

n=-72/-9

n=+8

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