-21=n+(-30)

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Solution for -21=n+(-30) equation: 



-21=n+(-30)

We move all terms to the left:

-21-(n+(-30))=0



We calculate terms in parentheses: -(n+(-30)), so:

n+(-30)

We add all the numbers together, and all the variables

n-30

Back to the equation:

-(n-30)



We get rid of parentheses

-n+30-21=0

We add all the numbers together, and all the variables

-1n+9=0

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

-n=-9

n=-9/-1

n=+9

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