-51=n-21

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Solution for -51=n-21 equation: 



-51=n-21

We move all terms to the left:

-51-(n-21)=0

We get rid of parentheses

-n+21-51=0

We add all the numbers together, and all the variables

-1n-30=0

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

-n=30

n=30/-1

n=-30

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