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r-4=+6r=3+8r
We move all terms to the left:
r-4-(+6r)=0
We get rid of parentheses
r-6r-4=0
We add all the numbers together, and all the variables
-5r-4=0
We move all terms containing r to the left, all other terms to the right
-5r=4
r=4/-5
r=-4/5
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