-7d+9=-10d-9

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



-7d+9=-10d-9

We move all terms to the left:

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

We get rid of parentheses

-7d+10d+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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