4-2d=20

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Solution for 4-2d=20 equation: 



4-2d=20

We move all terms to the left:

4-2d-(20)=0

We add all the numbers together, and all the variables

-2d-16=0

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

-2d=16

d=16/-2

d=-8

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