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7(n-3)=-n+3(5+)
We move all terms to the left:
7(n-3)-(-n+3(5+))=0
We add all the numbers together, and all the variables
7(n-3)-(-n+30)=0
We multiply parentheses
7n-(-n+30)-21=0
We get rid of parentheses
7n+n-30-21=0
We add all the numbers together, and all the variables
8n-51=0
We move all terms containing n to the left, all other terms to the right
8n=51
n=51/8
n=6+3/8
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