1=r+11

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Solution for 1=r+11 equation: 



1=r+11

We move all terms to the left:

1-(r+11)=0

We get rid of parentheses

-r-11+1=0

We add all the numbers together, and all the variables

-1r-10=0

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

-r=10

r=10/-1

r=-10

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