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9+7n=8n-7(n+5)
We move all terms to the left:
9+7n-(8n-7(n+5))=0
We calculate terms in parentheses: -(8n-7(n+5)), so:We get rid of parentheses
8n-7(n+5)
We multiply parentheses
8n-7n-35
We add all the numbers together, and all the variables
n-35
Back to the equation:
-(n-35)
7n-n+35+9=0
We add all the numbers together, and all the variables
6n+44=0
We move all terms containing n to the left, all other terms to the right
6n=-44
n=-44/6
n=-7+1/3
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