18=r+

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Solution for 18=r+ equation: 



18=r+

We move all terms to the left:

18-(r+)=0

We add all the numbers together, and all the variables

-(+r)+18=0

We get rid of parentheses

-r+18=0

We add all the numbers together, and all the variables

-1r+18=0

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

-r=-18

r=-18/-1

r=+18

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