-99=9(q-1)

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Solution for -99=9(q-1) equation: 



-99=9(q-1)

We move all terms to the left:

-99-(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+9-99=0

We add all the numbers together, and all the variables

-9q-90=0

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

-9q=90

q=90/-9

q=-10

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