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2.6r-0.1r=2.05
We move all terms to the left:
2.6r-0.1r-(2.05)=0
We add all the numbers together, and all the variables
2.5r-2.05=0
We move all terms containing r to the left, all other terms to the right
2.5r=2.05
r=2.05/2.5
r=1/1.219512195122
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