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47=8+5r
We move all terms to the left:
47-(8+5r)=0
We add all the numbers together, and all the variables
-(5r+8)+47=0
We get rid of parentheses
-5r-8+47=0
We add all the numbers together, and all the variables
-5r+39=0
We move all terms containing r to the left, all other terms to the right
-5r=-39
r=-39/-5
r=7+4/5
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