4=2n+12

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Solution for 4=2n+12 equation: 



4=2n+12

We move all terms to the left:

4-(2n+12)=0

We get rid of parentheses

-2n-12+4=0

We add all the numbers together, and all the variables

-2n-8=0

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

-2n=8

n=8/-2

n=-4

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