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6.9-9.7r=165.785
We move all terms to the left:
6.9-9.7r-(165.785)=0
We add all the numbers together, and all the variables
-9.7r-158.885=0
We move all terms containing r to the left, all other terms to the right
-9.7r=158.885
r=158.885/-9.7
r=-16+1/2.63229308005
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