-2d=-7-d

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Solution for -2d=-7-d equation: 



-2d=-7-d

We move all terms to the left:

-2d-(-7-d)=0

We add all the numbers together, and all the variables

-2d-(-1d-7)=0

We get rid of parentheses

-2d+1d+7=0

We add all the numbers together, and all the variables

-1d+7=0

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

-d=-7

d=-7/-1

d=+7

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