-3(n-10)=9

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Solution for -3(n-10)=9 equation: 



-3(n-10)=9

We move all terms to the left:

-3(n-10)-(9)=0

We multiply parentheses

-3n+30-9=0

We add all the numbers together, and all the variables

-3n+21=0

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

-3n=-21

n=-21/-3

n=+7

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