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2r+9+3r=6+5r+3
We move all terms to the left:
2r+9+3r-(6+5r+3)=0
We add all the numbers together, and all the variables
2r+3r-(5r+9)+9=0
We add all the numbers together, and all the variables
5r-(5r+9)+9=0
We get rid of parentheses
5r-5r-9+9=0
We add all the numbers together, and all the variables
=0
r=0/1
r=0
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