-(r-2)=1

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



-(r-2)=1

We move all terms to the left:

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

We get rid of parentheses

-r+2-1=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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