-(r-1)=2

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Solution for -(r-1)=2 equation: 



-(r-1)=2

We move all terms to the left:

-(r-1)-(2)=0

We get rid of parentheses

-r+1-2=0

We add all the numbers together, and all the variables

-1r-1=0

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

-r=1

r=1/-1

r=-1

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