2O=r+11

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Solution for 2O=r+11 equation: 



2=O+11

We move all terms to the left:

2-(O+11)=0

We get rid of parentheses

-O-11+2=0

We add all the numbers together, and all the variables

-1O-9=0

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

-O=9

O=9/-1

O=-9

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