7b-3b-2b-1=9

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Solution for 7b-3b-2b-1=9 equation: 



7b-3b-2b-1=9

We move all terms to the left:

7b-3b-2b-1-(9)=0

We add all the numbers together, and all the variables

2b-10=0

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

2b=10

b=10/2

b=5

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