(7n+12)=(10n-9)

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Solution for (7n+12)=(10n-9) equation: 



(7n+12)=(10n-9)

We move all terms to the left:

(7n+12)-((10n-9))=0

We get rid of parentheses

7n-((10n-9))+12=0



We calculate terms in parentheses: -((10n-9)), so:

(10n-9)

We get rid of parentheses

10n-9

Back to the equation:

-(10n-9)



We get rid of parentheses

7n-10n+9+12=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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