3d+18=-9d-18

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Solution for 3d+18=-9d-18 equation: 



3d+18=-9d-18

We move all terms to the left:

3d+18-(-9d-18)=0

We get rid of parentheses

3d+9d+18+18=0

We add all the numbers together, and all the variables

12d+36=0

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

12d=-36

d=-36/12

d=-3

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