3d+9=13

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Solution for 3d+9=13 equation: 



3d+9=13

We move all terms to the left:

3d+9-(13)=0

We add all the numbers together, and all the variables

3d-4=0

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

3d=4

d=4/3

d=1+1/3

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