84=7(r+4)

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Solution for 84=7(r+4) equation: 



84=7(r+4)

We move all terms to the left:

84-(7(r+4))=0



We calculate terms in parentheses: -(7(r+4)), so:

7(r+4)

We multiply parentheses

7r+28

Back to the equation:

-(7r+28)



We get rid of parentheses

-7r-28+84=0

We add all the numbers together, and all the variables

-7r+56=0

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

-7r=-56

r=-56/-7

r=+8

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