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9=10(n-8)
We move all terms to the left:
9-(10(n-8))=0
We calculate terms in parentheses: -(10(n-8)), so:We get rid of parentheses
10(n-8)
We multiply parentheses
10n-80
Back to the equation:
-(10n-80)
-10n+80+9=0
We add all the numbers together, and all the variables
-10n+89=0
We move all terms containing n to the left, all other terms to the right
-10n=-89
n=-89/-10
n=8+9/10
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