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2r-3.1=1.7r
We move all terms to the left:
2r-3.1-(1.7r)=0
We add all the numbers together, and all the variables
2r-(+1.7r)-3.1=0
We get rid of parentheses
2r-1.7r-3.1=0
We add all the numbers together, and all the variables
0.3r-3.1=0
We move all terms containing r to the left, all other terms to the right
0.3r=3.1
r=3.1/0.3
r=10+0.1/0.3
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