91=-7(r-6)

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Solution for 91=-7(r-6) equation: 



91=-7(r-6)

We move all terms to the left:

91-(-7(r-6))=0



We calculate terms in parentheses: -(-7(r-6)), so:

-7(r-6)

We multiply parentheses

-7r+42

Back to the equation:

-(-7r+42)



We get rid of parentheses

7r-42+91=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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