72=9(k+1)

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Solution for 72=9(k+1) equation: 



72=9(k+1)

We move all terms to the left:

72-(9(k+1))=0



We calculate terms in parentheses: -(9(k+1)), so:

9(k+1)

We multiply parentheses

9k+9

Back to the equation:

-(9k+9)



We get rid of parentheses

-9k-9+72=0

We add all the numbers together, and all the variables

-9k+63=0

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

-9k=-63

k=-63/-9

k=+7

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