12-2b=b-3

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Solution for 12-2b=b-3 equation: 



12-2b=b-3

We move all terms to the left:

12-2b-(b-3)=0

We get rid of parentheses

-2b-b+3+12=0

We add all the numbers together, and all the variables

-3b+15=0

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

-3b=-15

b=-15/-3

b=+5

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