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2.2r+0.47=1.76
We move all terms to the left:
2.2r+0.47-(1.76)=0
We add all the numbers together, and all the variables
2.2r-1.29=0
We move all terms containing r to the left, all other terms to the right
2.2r=1.29
r=1.29/2.2
r=1/1.70542635659
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