-3b-9b=129-29

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Solution for -3b-9b=129-29 equation: 



-3b-9b=129-29

We move all terms to the left:

-3b-9b-(129-29)=0

We add all the numbers together, and all the variables

-3b-9b-100=0

We add all the numbers together, and all the variables

-12b-100=0

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

-12b=100

b=100/-12

b=-8+1/3

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