86=-2(6+7r)

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Solution for 86=-2(6+7r) equation: 



86=-2(6+7r)

We move all terms to the left:

86-(-2(6+7r))=0

We add all the numbers together, and all the variables

-(-2(7r+6))+86=0



We calculate terms in parentheses: -(-2(7r+6)), so:

-2(7r+6)

We multiply parentheses

-14r-12

Back to the equation:

-(-14r-12)



We get rid of parentheses

14r+12+86=0

We add all the numbers together, and all the variables

14r+98=0

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

14r=-98

r=-98/14

r=-7

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