-2d-5=21

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Solution for -2d-5=21 equation: 



-2d-5=21

We move all terms to the left:

-2d-5-(21)=0

We add all the numbers together, and all the variables

-2d-26=0

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

-2d=26

d=26/-2

d=-13

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