-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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