9d+9+3d=-7+10d

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Solution for 9d+9+3d=-7+10d equation: 



9d+9+3d=-7+10d

We move all terms to the left:

9d+9+3d-(-7+10d)=0

We add all the numbers together, and all the variables

9d+3d-(10d-7)+9=0

We add all the numbers together, and all the variables

12d-(10d-7)+9=0

We get rid of parentheses

12d-10d+7+9=0

We add all the numbers together, and all the variables

2d+16=0

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

2d=-16

d=-16/2

d=-8

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