3b+12=7-2b

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Solution for 3b+12=7-2b equation: 



3b+12=7-2b

We move all terms to the left:

3b+12-(7-2b)=0

We add all the numbers together, and all the variables

3b-(-2b+7)+12=0

We get rid of parentheses

3b+2b-7+12=0

We add all the numbers together, and all the variables

5b+5=0

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

5b=-5

b=-5/5

b=-1

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