9b-21=-363

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Solution for 9b-21=-363 equation: 



9b-21=-363

We move all terms to the left:

9b-21-(-363)=0

We add all the numbers together, and all the variables

9b+342=0

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

9b=-342

b=-342/9

b=-38

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