9d+4=12d-20

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Solution for 9d+4=12d-20 equation: 



9d+4=12d-20

We move all terms to the left:

9d+4-(12d-20)=0

We get rid of parentheses

9d-12d+20+4=0

We add all the numbers together, and all the variables

-3d+24=0

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

-3d=-24

d=-24/-3

d=+8

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