3d-9=9d+15

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Solution for 3d-9=9d+15 equation: 



3d-9=9d+15

We move all terms to the left:

3d-9-(9d+15)=0

We get rid of parentheses

3d-9d-15-9=0

We add all the numbers together, and all the variables

-6d-24=0

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

-6d=24

d=24/-6

d=-4

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