84=7(5+r)

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



84=7(5+r)

We move all terms to the left:

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

We add all the numbers together, and all the variables

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