4=n+5+7

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Solution for 4=n+5+7 equation: 



4=n+5+7

We move all terms to the left:

4-(n+5+7)=0

We add all the numbers together, and all the variables

-(n+12)+4=0

We get rid of parentheses

-n-12+4=0

We add all the numbers together, and all the variables

-1n-8=0

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

-n=8

n=8/-1

n=-8

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