84=4(r-27)

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Solution for 84=4(r-27) equation: 



84=4(r-27)

We move all terms to the left:

84-(4(r-27))=0



We calculate terms in parentheses: -(4(r-27)), so:

4(r-27)

We multiply parentheses

4r-108

Back to the equation:

-(4r-108)



We get rid of parentheses

-4r+108+84=0

We add all the numbers together, and all the variables

-4r+192=0

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

-4r=-192

r=-192/-4

r=+48

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