-7d+9=-9+-9d

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



-7d+9=-9+-9d

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-7d+9d+9=0

We add all the numbers together, and all the variables

2d+9=0

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

2d=-9

d=-9/2

d=-4+1/2

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