9=-3(n-1)

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Solution for 9=-3(n-1) equation: 



9=-3(n-1)

We move all terms to the left:

9-(-3(n-1))=0



We calculate terms in parentheses: -(-3(n-1)), so:

-3(n-1)

We multiply parentheses

-3n+3

Back to the equation:

-(-3n+3)



We get rid of parentheses

3n-3+9=0

We add all the numbers together, and all the variables

3n+6=0

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

3n=-6

n=-6/3

n=-2

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