27=9+2r

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Solution for 27=9+2r equation: 



27=9+2r

We move all terms to the left:

27-(9+2r)=0

We add all the numbers together, and all the variables

-(2r+9)+27=0

We get rid of parentheses

-2r-9+27=0

We add all the numbers together, and all the variables

-2r+18=0

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

-2r=-18

r=-18/-2

r=+9

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