9(q-81)=81

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Solution for 9(q-81)=81 equation: 



9(q-81)=81

We move all terms to the left:

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

We multiply parentheses

9q-729-81=0

We add all the numbers together, and all the variables

9q-810=0

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

9q=810

q=810/9

q=90

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