-1=-(r+-17)+-9

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Solution for -1=-(r+-17)+-9 equation: 



-1=-(r+-17)+-9

We move all terms to the left:

-1-(-(r+-17)+-9)=0

We add all the numbers together, and all the variables

-(-(r-17)+-9)-1=0

We use the square of the difference formula

-(-(r-17)-9)-1=0



We calculate terms in parentheses: -(-(r-17)-9), so:

-(r-17)-9

We get rid of parentheses

-r+17-9

We add all the numbers together, and all the variables

-1r+8

Back to the equation:

-(-1r+8)



We get rid of parentheses

1r-8-1=0

We add all the numbers together, and all the variables

r-9=0

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

r=9

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