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55=3(2n-1)+2(n+5)
We move all terms to the left:
55-(3(2n-1)+2(n+5))=0
We calculate terms in parentheses: -(3(2n-1)+2(n+5)), so:We get rid of parentheses
3(2n-1)+2(n+5)
We multiply parentheses
6n+2n-3+10
We add all the numbers together, and all the variables
8n+7
Back to the equation:
-(8n+7)
-8n-7+55=0
We add all the numbers together, and all the variables
-8n+48=0
We move all terms containing n to the left, all other terms to the right
-8n=-48
n=-48/-8
n=+6
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