216=(6^2r-11)

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Solution for 216=(6^2r-11) equation: 



216=(6^2r-11)

We move all terms to the left:

216-((6^2r-11))=0



We calculate terms in parentheses: -((6^2r-11)), so:

(6^2r-11)

We get rid of parentheses

6^2r-11

Back to the equation:

-(6^2r-11)



We get rid of parentheses

-6^2r+11+216=0

We add all the numbers together, and all the variables

-6^2r+227=0

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

-6^2r=-227

r=-227/1

r=-227

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