12=-r-11=

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Solution for 12=-r-11= equation: 



12=-r-11=

We move all terms to the left:

12-(-r-11)=0

We add all the numbers together, and all the variables

-(-1r-11)+12=0

We get rid of parentheses

1r+11+12=0

We add all the numbers together, and all the variables

r+23=0

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

r=-23

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