-3d+12=-15-4d

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Solution for -3d+12=-15-4d equation: 



-3d+12=-15-4d

We move all terms to the left:

-3d+12-(-15-4d)=0

We add all the numbers together, and all the variables

-3d-(-4d-15)+12=0

We get rid of parentheses

-3d+4d+15+12=0

We add all the numbers together, and all the variables

d+27=0

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

d=-27

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