7d-4=8d

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Solution for 7d-4=8d equation: 



7d-4=8d

We move all terms to the left:

7d-4-(8d)=0

We add all the numbers together, and all the variables

-1d-4=0

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

-d=4

d=4/-1

d=-4

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