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26+8r=6(7+r)
We move all terms to the left:
26+8r-(6(7+r))=0
We add all the numbers together, and all the variables
8r-(6(r+7))+26=0
We calculate terms in parentheses: -(6(r+7)), so:We get rid of parentheses
6(r+7)
We multiply parentheses
6r+42
Back to the equation:
-(6r+42)
8r-6r-42+26=0
We add all the numbers together, and all the variables
2r-16=0
We move all terms containing r to the left, all other terms to the right
2r=16
r=16/2
r=8
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