7d-4d=27

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Solution for 7d-4d=27 equation: 



7d-4d=27

We move all terms to the left:

7d-4d-(27)=0

We add all the numbers together, and all the variables

3d-27=0

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

3d=27

d=27/3

d=9

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