2+n+n=3n+9

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Solution for 2+n+n=3n+9 equation: 



2+n+n=3n+9

We move all terms to the left:

2+n+n-(3n+9)=0

We add all the numbers together, and all the variables

2n-(3n+9)+2=0

We get rid of parentheses

2n-3n-9+2=0

We add all the numbers together, and all the variables

-1n-7=0

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

-n=7

n=7/-1

n=-7

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