12=2(r-11)

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Solution for 12=2(r-11) equation: 



12=2(r-11)

We move all terms to the left:

12-(2(r-11))=0



We calculate terms in parentheses: -(2(r-11)), so:

2(r-11)

We multiply parentheses

2r-22

Back to the equation:

-(2r-22)



We get rid of parentheses

-2r+22+12=0

We add all the numbers together, and all the variables

-2r+34=0

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

-2r=-34

r=-34/-2

r=+17

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