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-7r-4=4r+2
We move all terms to the left:
-7r-4-(4r+2)=0
We get rid of parentheses
-7r-4r-2-4=0
We add all the numbers together, and all the variables
-11r-6=0
We move all terms containing r to the left, all other terms to the right
-11r=6
r=6/-11
r=-6/11
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