2d+12=-2d-12

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Solution for 2d+12=-2d-12 equation: 



2d+12=-2d-12

We move all terms to the left:

2d+12-(-2d-12)=0

We get rid of parentheses

2d+2d+12+12=0

We add all the numbers together, and all the variables

4d+24=0

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

4d=-24

d=-24/4

d=-6

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