3-9d=12-6d

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Solution for 3-9d=12-6d equation: 



3-9d=12-6d

We move all terms to the left:

3-9d-(12-6d)=0

We add all the numbers together, and all the variables

-9d-(-6d+12)+3=0

We get rid of parentheses

-9d+6d-12+3=0

We add all the numbers together, and all the variables

-3d-9=0

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

-3d=9

d=9/-3

d=-3

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