-30=3n-(-12)

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Solution for -30=3n-(-12) equation: 



-30=3n-(-12)

We move all terms to the left:

-30-(3n-(-12))=0



We calculate terms in parentheses: -(3n-(-12)), so:

3n-(-12)

We add all the numbers together, and all the variables

3n+12

Back to the equation:

-(3n+12)



We get rid of parentheses

-3n-12-30=0

We add all the numbers together, and all the variables

-3n-42=0

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

-3n=42

n=42/-3

n=-14

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