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-16.7r+7.64=8.68-18r
We move all terms to the left:
-16.7r+7.64-(8.68-18r)=0
We add all the numbers together, and all the variables
-16.7r-(-18r+8.68)+7.64=0
We get rid of parentheses
-16.7r+18r-8.68+7.64=0
We add all the numbers together, and all the variables
1.3r-1.04=0
We move all terms containing r to the left, all other terms to the right
1.3r=1.04
r=1.04/1.3
r=1/1.25
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