9b-4-2b=31

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Solution for 9b-4-2b=31 equation: 



9b-4-2b=31

We move all terms to the left:

9b-4-2b-(31)=0

We add all the numbers together, and all the variables

7b-35=0

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

7b=35

b=35/7

b=5

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