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2808*2808=8+3.5r
We move all terms to the left:
2808*2808-(8+3.5r)=0
We add all the numbers together, and all the variables
-(3.5r+8)+2808*2808=0
We add all the numbers together, and all the variables
-(3.5r+8)+7884864=0
We get rid of parentheses
-3.5r-8+7884864=0
We add all the numbers together, and all the variables
-3.5r+7884856=0
We move all terms containing r to the left, all other terms to the right
-3.5r=-7884856
r=-7884856/-3.5
r=+2252816
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