9d-4d-2d+12=-3d

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Solution for 9d-4d-2d+12=-3d equation: 



9d-4d-2d+12=-3d

We move all terms to the left:

9d-4d-2d+12-(-3d)=0

We add all the numbers together, and all the variables

3d-(-3d)+12=0

We get rid of parentheses

3d+3d+12=0

We add all the numbers together, and all the variables

6d+12=0

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

6d=-12

d=-12/6

d=-2

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