2=(r-1)

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Solution for 2=(r-1) equation: 



2=(r-1)

We move all terms to the left:

2-((r-1))=0



We calculate terms in parentheses: -((r-1)), so:

(r-1)

We get rid of parentheses

r-1

Back to the equation:

-(r-1)



We get rid of parentheses

-r+1+2=0

We add all the numbers together, and all the variables

-1r+3=0

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

-r=-3

r=-3/-1

r=+3

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