27=9(r-87)

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Solution for 27=9(r-87) equation: 



27=9(r-87)

We move all terms to the left:

27-(9(r-87))=0



We calculate terms in parentheses: -(9(r-87)), so:

9(r-87)

We multiply parentheses

9r-783

Back to the equation:

-(9r-783)



We get rid of parentheses

-9r+783+27=0

We add all the numbers together, and all the variables

-9r+810=0

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

-9r=-810

r=-810/-9

r=+90

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