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=(4R+20/20)
We move all terms to the left:
-((4R+20/20))=0
We add all the numbers together, and all the variables
-((4R+1))=0
We calculate terms in parentheses: -((4R+1)), so:We get rid of parentheses
(4R+1)
We get rid of parentheses
4R+1
Back to the equation:
-(4R+1)
-4R-1=0
We move all terms containing R to the left, all other terms to the right
-4R=1
R=1/-4
R=-1/4
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