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8r+6=(r+3)+3r
We move all terms to the left:
8r+6-((r+3)+3r)=0
We calculate terms in parentheses: -((r+3)+3r), so:We get rid of parentheses
(r+3)+3r
We add all the numbers together, and all the variables
3r+(r+3)
We get rid of parentheses
3r+r+3
We add all the numbers together, and all the variables
4r+3
Back to the equation:
-(4r+3)
8r-4r-3+6=0
We add all the numbers together, and all the variables
4r+3=0
We move all terms containing r to the left, all other terms to the right
4r=-3
r=-3/4
r=-3/4
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