-(r+13)=-9

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Solution for -(r+13)=-9 equation: 



-(r+13)=-9

We move all terms to the left:

-(r+13)-(-9)=0

We add all the numbers together, and all the variables

-(r+13)+9=0

We get rid of parentheses

-r-13+9=0

We add all the numbers together, and all the variables

-1r-4=0

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

-r=4

r=4/-1

r=-4

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