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.6r-5r+11=12.1
We move all terms to the left:
.6r-5r+11-(12.1)=0
We add all the numbers together, and all the variables
-4.4r-1.1=0
We move all terms containing r to the left, all other terms to the right
-4.4r=1.1
r=1.1/-4.4
r=-1/4
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