-104=-7r-8(r-2)

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Solution for -104=-7r-8(r-2) equation: 



-104=-7r-8(r-2)

We move all terms to the left:

-104-(-7r-8(r-2))=0



We calculate terms in parentheses: -(-7r-8(r-2)), so:

-7r-8(r-2)

We multiply parentheses

-7r-8r+16

We add all the numbers together, and all the variables

-15r+16

Back to the equation:

-(-15r+16)



We get rid of parentheses

15r-16-104=0

We add all the numbers together, and all the variables

15r-120=0

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

15r=120

r=120/15

r=8

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