12-3=2b

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Solution for 12-3=2b equation: 



12-3=2b

We move all terms to the left:

12-3-(2b)=0

We add all the numbers together, and all the variables

-2b+9=0

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

-2b=-9

b=-9/-2

b=4+1/2

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