13b-9=30

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Solution for 13b-9=30 equation: 



13b-9=30

We move all terms to the left:

13b-9-(30)=0

We add all the numbers together, and all the variables

13b-39=0

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

13b=39

b=39/13

b=3

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