-b+(-3)=-9

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



-b+(-3)=-9

We move all terms to the left:

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

We add all the numbers together, and all the variables

-1b+6=0

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

-b=-6

b=-6/-1

b=+6

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