-102=-3r+2(1+8r)

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Solution for -102=-3r+2(1+8r) equation: 



-102=-3r+2(1+8r)

We move all terms to the left:

-102-(-3r+2(1+8r))=0

We add all the numbers together, and all the variables

-(-3r+2(8r+1))-102=0



We calculate terms in parentheses: -(-3r+2(8r+1)), so:

-3r+2(8r+1)

We multiply parentheses

-3r+16r+2

We add all the numbers together, and all the variables

13r+2

Back to the equation:

-(13r+2)



We get rid of parentheses

-13r-2-102=0

We add all the numbers together, and all the variables

-13r-104=0

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

-13r=104

r=104/-13

r=-8

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