-r-11=r-1+2

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Solution for -r-11=r-1+2 equation: 



-r-11=r-1+2

We move all terms to the left:

-r-11-(r-1+2)=0

We add all the numbers together, and all the variables

-r-(r+1)-11=0

We add all the numbers together, and all the variables

-1r-(r+1)-11=0

We get rid of parentheses

-1r-r-1-11=0

We add all the numbers together, and all the variables

-2r-12=0

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

-2r=12

r=12/-2

r=-6

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