-3r-(8r-4)=-84

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Solution for -3r-(8r-4)=-84 equation: 



-3r-(8r-4)=-84

We move all terms to the left:

-3r-(8r-4)-(-84)=0

We add all the numbers together, and all the variables

-3r-(8r-4)+84=0

We get rid of parentheses

-3r-8r+4+84=0

We add all the numbers together, and all the variables

-11r+88=0

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

-11r=-88

r=-88/-11

r=+8

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