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-19n+7=9(^-3n-9)
We move all terms to the left:
-19n+7-(9(^-3n-9))=0
We calculate terms in parentheses: -(9(^-3n-9)), so:We get rid of parentheses
9(^-3n-9)
We multiply parentheses
-27n-81+
We add all the numbers together, and all the variables
-27n
Back to the equation:
-(-27n)
-19n+27n+7=0
We add all the numbers together, and all the variables
8n+7=0
We move all terms containing n to the left, all other terms to the right
8n=-7
n=-7/8
n=-7/8
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