4d+3d+7=84

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Solution for 4d+3d+7=84 equation: 



4d+3d+7=84

We move all terms to the left:

4d+3d+7-(84)=0

We add all the numbers together, and all the variables

7d-77=0

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

7d=77

d=77/7

d=11

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