-8=-2(2r+6)+8(r+1)

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Solution for -8=-2(2r+6)+8(r+1) equation: 



-8=-2(2r+6)+8(r+1)

We move all terms to the left:

-8-(-2(2r+6)+8(r+1))=0



We calculate terms in parentheses: -(-2(2r+6)+8(r+1)), so:

-2(2r+6)+8(r+1)

We multiply parentheses

-4r+8r-12+8

We add all the numbers together, and all the variables

4r-4

Back to the equation:

-(4r-4)



We get rid of parentheses

-4r+4-8=0

We add all the numbers together, and all the variables

-4r-4=0

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

-4r=4

r=4/-4

r=-1

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