n+n+2+n+4=405

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Solution for n+n+2+n+4=405 equation: 



n+n+2+n+4=405

We move all terms to the left:

n+n+2+n+4-(405)=0

We add all the numbers together, and all the variables

3n-399=0

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

3n=399

n=399/3

n=133

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