3d=7d-9

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Solution for 3d=7d-9 equation: 



3d=7d-9

We move all terms to the left:

3d-(7d-9)=0

We get rid of parentheses

3d-7d+9=0

We add all the numbers together, and all the variables

-4d+9=0

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

-4d=-9

d=-9/-4

d=2+1/4

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