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=7Y(2.21)
We move all terms to the left:
-(7Y(2.21))=0
We calculate terms in parentheses: -(7Y(2.21)), so:We add all the numbers together, and all the variables
7Y(2.21)
We multiply parentheses
15.47Y
Back to the equation:
-(15.47Y)
-(+15.47Y)=0
We get rid of parentheses
-15.47Y=0
Y=0/-15.47
Y=0
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