-(3+b)=b-9

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Solution for -(3+b)=b-9 equation: 



-(3+b)=b-9

We move all terms to the left:

-(3+b)-(b-9)=0

We add all the numbers together, and all the variables

-(b+3)-(b-9)=0

We get rid of parentheses

-b-b-3+9=0

We add all the numbers together, and all the variables

-2b+6=0

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

-2b=-6

b=-6/-2

b=+3

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