2n=123-n

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Solution for 2n=123-n equation: 



2n=123-n

We move all terms to the left:

2n-(123-n)=0

We add all the numbers together, and all the variables

2n-(-1n+123)=0

We get rid of parentheses

2n+1n-123=0

We add all the numbers together, and all the variables

3n-123=0

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

3n=123

n=123/3

n=41

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