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r-8.7/3.6=3.723
We move all terms to the left:
r-8.7/3.6-(3.723)=0
We add all the numbers together, and all the variables
r-3.723-8.7/3.6=0
We multiply all the terms by the denominator
r*3.6-8.7-(3.723)*3.6=0
We add all the numbers together, and all the variables
r*3.6-22.1028=0
Wy multiply elements
3.6r-22.1028=0
We move all terms containing r to the left, all other terms to the right
3.6r=22.1028
r=22.1028/3.6
r=6+0.5028/3.6
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