9=3b-1=7b-2

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



9=3b-1=7b-2

We move all terms to the left:

9-(3b-1)=0

We get rid of parentheses

-3b+1+9=0

We add all the numbers together, and all the variables

-3b+10=0

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

-3b=-10

b=-10/-3

b=3+1/3

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