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2(3r+6)=2(5r+6)
We move all terms to the left:
2(3r+6)-(2(5r+6))=0
We multiply parentheses
6r-(2(5r+6))+12=0
We calculate terms in parentheses: -(2(5r+6)), so:We get rid of parentheses
2(5r+6)
We multiply parentheses
10r+12
Back to the equation:
-(10r+12)
6r-10r-12+12=0
We add all the numbers together, and all the variables
-4r=0
r=0/-4
r=0
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