12+3=-2b-4

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Solution for 12+3=-2b-4 equation: 



12+3=-2b-4

We move all terms to the left:

12+3-(-2b-4)=0

We add all the numbers together, and all the variables

-(-2b-4)+15=0

We get rid of parentheses

2b+4+15=0

We add all the numbers together, and all the variables

2b+19=0

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

2b=-19

b=-19/2

b=-9+1/2

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