(-b-1)=9

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Solution for (-b-1)=9 equation: 



(-b-1)=9

We move all terms to the left:

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

We add all the numbers together, and all the variables

(-1b-1)-9=0

We get rid of parentheses

-1b-1-9=0

We add all the numbers together, and all the variables

-1b-10=0

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

-b=10

b=10/-1

b=-10

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