-3+7d=9d+9

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



-3+7d=9d+9

We move all terms to the left:

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

We get rid of parentheses

7d-9d-9-3=0

We add all the numbers together, and all the variables

-2d-12=0

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

-2d=12

d=12/-2

d=-6

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