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-9.53=-4r+2.47
We move all terms to the left:
-9.53-(-4r+2.47)=0
We get rid of parentheses
4r-2.47-9.53=0
We add all the numbers together, and all the variables
4r-12=0
We move all terms containing r to the left, all other terms to the right
4r=12
r=12/4
r=3
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