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43=2r+(4r+1)
We move all terms to the left:
43-(2r+(4r+1))=0
We calculate terms in parentheses: -(2r+(4r+1)), so:We get rid of parentheses
2r+(4r+1)
We get rid of parentheses
2r+4r+1
We add all the numbers together, and all the variables
6r+1
Back to the equation:
-(6r+1)
-6r-1+43=0
We add all the numbers together, and all the variables
-6r+42=0
We move all terms containing r to the left, all other terms to the right
-6r=-42
r=-42/-6
r=+7
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