9d-7d=8

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Solution for 9d-7d=8 equation: 



9d-7d=8

We move all terms to the left:

9d-7d-(8)=0

We add all the numbers together, and all the variables

2d-8=0

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

2d=8

d=8/2

d=4

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