-8=4(r+7)

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Solution for -8=4(r+7) equation: 



-8=4(r+7)

We move all terms to the left:

-8-(4(r+7))=0



We calculate terms in parentheses: -(4(r+7)), so:

4(r+7)

We multiply parentheses

4r+28

Back to the equation:

-(4r+28)



We get rid of parentheses

-4r-28-8=0

We add all the numbers together, and all the variables

-4r-36=0

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

-4r=36

r=36/-4

r=-9

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