-3-d=-3d+9

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



-3-d=-3d+9

We move all terms to the left:

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

We add all the numbers together, and all the variables

-1d-(-3d+9)-3=0

We get rid of parentheses

-1d+3d-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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