81=9(q+1)

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Solution for 81=9(q+1) equation: 



81=9(q+1)

We move all terms to the left:

81-(9(q+1))=0



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

9(q+1)

We multiply parentheses

9q+9

Back to the equation:

-(9q+9)



We get rid of parentheses

-9q-9+81=0

We add all the numbers together, and all the variables

-9q+72=0

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

-9q=-72

q=-72/-9

q=+8

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