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2r+8.5=14.2
We move all terms to the left:
2r+8.5-(14.2)=0
We add all the numbers together, and all the variables
2r-5.7=0
We move all terms containing r to the left, all other terms to the right
2r=5.7
r=5.7/2
r=2+1/1.1764705882353
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