-30=12-n

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Solution for -30=12-n equation: 



-30=12-n

We move all terms to the left:

-30-(12-n)=0

We add all the numbers together, and all the variables

-(-1n+12)-30=0

We get rid of parentheses

1n-12-30=0

We add all the numbers together, and all the variables

n-42=0

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

n=42

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