-86=2(5+8r)

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Solution for -86=2(5+8r) equation: 



-86=2(5+8r)

We move all terms to the left:

-86-(2(5+8r))=0

We add all the numbers together, and all the variables

-(2(8r+5))-86=0



We calculate terms in parentheses: -(2(8r+5)), so:

2(8r+5)

We multiply parentheses

16r+10

Back to the equation:

-(16r+10)



We get rid of parentheses

-16r-10-86=0

We add all the numbers together, and all the variables

-16r-96=0

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

-16r=96

r=96/-16

r=-6

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