12+3b=3

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Solution for 12+3b=3 equation: 



12+3b=3

We move all terms to the left:

12+3b-(3)=0

We add all the numbers together, and all the variables

3b+9=0

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

3b=-9

b=-9/3

b=-3

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