15=2.25r

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Solution for 15=2.25r equation: 



15=2.25r

We move all terms to the left:

15-(2.25r)=0

We add all the numbers together, and all the variables

-(+2.25r)+15=0

We get rid of parentheses

-2.25r+15=0

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

-2.25r=-15

r=-15/-2.25

r=6+1/1.5

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