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r/2.1=17.3
We move all terms to the left:
r/2.1-(17.3)=0
We add all the numbers together, and all the variables
r/2.1-17.3=0
We multiply all the terms by the denominator
r-(17.3)*2.1=0
We add all the numbers together, and all the variables
r-36.33=0
We move all terms containing r to the left, all other terms to the right
r=36.33
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