84=65-r

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Solution for 84=65-r equation: 



84=65-r

We move all terms to the left:

84-(65-r)=0

We add all the numbers together, and all the variables

-(-1r+65)+84=0

We get rid of parentheses

1r-65+84=0

We add all the numbers together, and all the variables

r+19=0

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

r=-19

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