n21=-7-2n

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Solution for n21=-7-2n equation: 



n21=-7-2n

We move all terms to the left:

n21-(-7-2n)=0

We add all the numbers together, and all the variables

n21-(-2n-7)=0

We add all the numbers together, and all the variables

n^21-(-2n-7)=0

We get rid of parentheses

n^21+2n+7=0

We do not support enpression: n^21

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