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5(n-9)=8n
We move all terms to the left:
5(n-9)-(8n)=0
We add all the numbers together, and all the variables
-8n+5(n-9)=0
We multiply parentheses
-8n+5n-45=0
We add all the numbers together, and all the variables
-3n-45=0
We move all terms containing n to the left, all other terms to the right
-3n=45
n=45/-3
n=-15
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