84=4r-27

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Solution for 84=4r-27 equation: 



84=4r-27

We move all terms to the left:

84-(4r-27)=0

We get rid of parentheses

-4r+27+84=0

We add all the numbers together, and all the variables

-4r+111=0

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

-4r=-111

r=-111/-4

r=27+3/4

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