3+2b=12-b

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



3+2b=12-b

We move all terms to the left:

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

We add all the numbers together, and all the variables

2b-(-1b+12)+3=0

We get rid of parentheses

2b+1b-12+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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