28=r-

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Solution for 28=r- equation: 



28=r-

We move all terms to the left:

28-(r-)=0

We add all the numbers together, and all the variables

-(+r)+28=0

We get rid of parentheses

-r+28=0

We add all the numbers together, and all the variables

-1r+28=0

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

-r=-28

r=-28/-1

r=+28

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