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817=201+5r
We move all terms to the left:
817-(201+5r)=0
We add all the numbers together, and all the variables
-(5r+201)+817=0
We get rid of parentheses
-5r-201+817=0
We add all the numbers together, and all the variables
-5r+616=0
We move all terms containing r to the left, all other terms to the right
-5r=-616
r=-616/-5
r=123+1/5
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