7d-8d=-3

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Solution for 7d-8d=-3 equation: 



7d-8d=-3

We move all terms to the left:

7d-8d-(-3)=0

We add all the numbers together, and all the variables

-1d+3=0

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

-d=-3

d=-3/-1

d=+3

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