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75.2=7.3r
We move all terms to the left:
75.2-(7.3r)=0
We add all the numbers together, and all the variables
-(+7.3r)+75.2=0
We get rid of parentheses
-7.3r+75.2=0
We move all terms containing r to the left, all other terms to the right
-7.3r=-75.2
r=-75.2/-7.3
r=10+2.2/7.3
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