-15d-20=-17d-4

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Solution for -15d-20=-17d-4 equation: 



-15d-20=-17d-4

We move all terms to the left:

-15d-20-(-17d-4)=0

We get rid of parentheses

-15d+17d+4-20=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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