-2b=-b-9

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



-2b=-b-9

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-2b+1b+9=0

We add all the numbers together, and all the variables

-1b+9=0

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

-b=-9

b=-9/-1

b=+9

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