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8r-2=4r-3
We move all terms to the left:
8r-2-(4r-3)=0
We get rid of parentheses
8r-4r+3-2=0
We add all the numbers together, and all the variables
4r+1=0
We move all terms containing r to the left, all other terms to the right
4r=-1
r=-1/4
r=-1/4
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