4.5=0.9r

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Solution for 4.5=0.9r equation: 



4.5=0.9r

We move all terms to the left:

4.5-(0.9r)=0

We add all the numbers together, and all the variables

-(+0.9r)+4.5=0

We get rid of parentheses

-0.9r+4.5=0

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

-0.9r=-4.5

r=-4.5/-0.9

r=+5

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