-7d+9=-9-4d

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Solution for -7d+9=-9-4d equation: 



-7d+9=-9-4d

We move all terms to the left:

-7d+9-(-9-4d)=0

We add all the numbers together, and all the variables

-7d-(-4d-9)+9=0

We get rid of parentheses

-7d+4d+9+9=0

We add all the numbers together, and all the variables

-3d+18=0

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

-3d=-18

d=-18/-3

d=+6

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