(9b)=-81

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Solution for (9b)=-81 equation: 



(9b)=-81

We move all terms to the left:

(9b)-(-81)=0

We add all the numbers together, and all the variables

9b+81=0

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

9b=-81

b=-81/9

b=-9

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