7d-3=d-9

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Solution for 7d-3=d-9 equation: 



7d-3=d-9

We move all terms to the left:

7d-3-(d-9)=0

We get rid of parentheses

7d-d+9-3=0

We add all the numbers together, and all the variables

6d+6=0

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

6d=-6

d=-6/6

d=-1

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