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n=(4.20)(2.n)
We move all terms to the left:
n-((4.20)(2.n))=0
We add all the numbers together, and all the variables
n-((4.2)(+2.n))=0
We multiply parentheses ..
n-((+8.4n))=0
We calculate terms in parentheses: -((+8.4n)), so:We add all the numbers together, and all the variables
(+8.4n)
We get rid of parentheses
8.4n
Back to the equation:
-(8.4n)
n-(+8.4n)=0
We get rid of parentheses
n-8.4n=0
We add all the numbers together, and all the variables
-7.4n=0
n=0/-7.4
n=0
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