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