-1=r-(-10)

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Solution for -1=r-(-10) equation: 



-1=r-(-10)

We move all terms to the left:

-1-(r-(-10))=0



We calculate terms in parentheses: -(r-(-10)), so:

r-(-10)

We add all the numbers together, and all the variables

r+10

Back to the equation:

-(r+10)



We get rid of parentheses

-r-10-1=0

We add all the numbers together, and all the variables

-1r-11=0

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

-r=11

r=11/-1

r=-11

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