3d+4d+7d-6d=40

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Solution for 3d+4d+7d-6d=40 equation: 



3d+4d+7d-6d=40

We move all terms to the left:

3d+4d+7d-6d-(40)=0

We add all the numbers together, and all the variables

8d-40=0

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

8d=40

d=40/8

d=5

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