-9=(r-(-28)-8)

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Solution for -9=(r-(-28)-8) equation: 



-9=(r-(-28)-8)

We move all terms to the left:

-9-((r-(-28)-8))=0



We calculate terms in parentheses: -((r-(-28)-8)), so:

(r-(-28)-8)



We calculate terms in parentheses: +(r-(-28)-8), so:

r-(-28)-8

determiningTheFunctionDomain
r-8-(-28)

We add all the numbers together, and all the variables

r+20

Back to the equation:

+(r+20)



We get rid of parentheses

r+20

Back to the equation:

-(r+20)



We get rid of parentheses

-r-20-9=0

We add all the numbers together, and all the variables

-1r-29=0

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

-r=29

r=29/-1

r=-29

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