7d+6-9=-30

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Solution for 7d+6-9=-30 equation: 



7d+6-9=-30

We move all terms to the left:

7d+6-9-(-30)=0

We add all the numbers together, and all the variables

7d+27=0

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

7d=-27

d=-27/7

d=-3+6/7

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