-2b+9=-11

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Solution for -2b+9=-11 equation: 



-2b+9=-11

We move all terms to the left:

-2b+9-(-11)=0

We add all the numbers together, and all the variables

-2b+20=0

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

-2b=-20

b=-20/-2

b=+10

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