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2.5=4.8r
We move all terms to the left:
2.5-(4.8r)=0
We add all the numbers together, and all the variables
-(+4.8r)+2.5=0
We get rid of parentheses
-4.8r+2.5=0
We move all terms containing r to the left, all other terms to the right
-4.8r=-2.5
r=-2.5/-4.8
r=1/1.92
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