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4r-3=2r+8
We move all terms to the left:
4r-3-(2r+8)=0
We get rid of parentheses
4r-2r-8-3=0
We add all the numbers together, and all the variables
2r-11=0
We move all terms containing r to the left, all other terms to the right
2r=11
r=11/2
r=5+1/2
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