7d+6d+5d+4d+3d+2d=54

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Solution for 7d+6d+5d+4d+3d+2d=54 equation: 



7d+6d+5d+4d+3d+2d=54

We move all terms to the left:

7d+6d+5d+4d+3d+2d-(54)=0

We add all the numbers together, and all the variables

27d-54=0

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

27d=54

d=54/27

d=2

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