7d-5d-d+9=8

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Solution for 7d-5d-d+9=8 equation: 



7d-5d-d+9=8

We move all terms to the left:

7d-5d-d+9-(8)=0

We add all the numbers together, and all the variables

d+1=0

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

d=-1

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