3d+9=12

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Solution for 3d+9=12 equation: 



3d+9=12

We move all terms to the left:

3d+9-(12)=0

We add all the numbers together, and all the variables

3d-3=0

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

3d=3

d=3/3

d=1

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