72=4.5rr

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Solution for 72=4.5rr equation: 



72=4.5rr

We move all terms to the left:

72-(4.5rr)=0

We add all the numbers together, and all the variables

-(+4.5rr)+72=0

We get rid of parentheses

-4.5rr+72=0

We move all terms containing r to the left, all other terms to the right

-4.5rr=-72

r=-72/1

r=-72

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