6*(n+2)-9*(n-1)=0

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Solution for 6*(n+2)-9*(n-1)=0 equation: 



6(n+2)-9(n-1)=0

We multiply parentheses

6n-9n+12+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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