84=-7(r-5)

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Solution for 84=-7(r-5) equation: 



84=-7(r-5)

We move all terms to the left:

84-(-7(r-5))=0



We calculate terms in parentheses: -(-7(r-5)), so:

-7(r-5)

We multiply parentheses

-7r+35

Back to the equation:

-(-7r+35)



We get rid of parentheses

7r-35+84=0

We add all the numbers together, and all the variables

7r+49=0

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

7r=-49

r=-49/7

r=-7

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