-d+9=-3d-7

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



-d+9=-3d-7

We move all terms to the left:

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

We add all the numbers together, and all the variables

-1d-(-3d-7)+9=0

We get rid of parentheses

-1d+3d+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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