-2(b+1)=11+9

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Solution for -2(b+1)=11+9 equation: 



-2(b+1)=11+9

We move all terms to the left:

-2(b+1)-(11+9)=0

We add all the numbers together, and all the variables

-2(b+1)-20=0

We multiply parentheses

-2b-2-20=0

We add all the numbers together, and all the variables

-2b-22=0

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

-2b=22

b=22/-2

b=-11

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