d=(-2-1)

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Solution for d=(-2-1) equation: 



d=(-2-1)

We move all terms to the left:

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

We add all the numbers together, and all the variables

d-((-3))=0

We add all the numbers together, and all the variables

d+3=0

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

d=-3

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