9d-12=8d+20

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Solution for 9d-12=8d+20 equation: 



9d-12=8d+20

We move all terms to the left:

9d-12-(8d+20)=0

We get rid of parentheses

9d-8d-20-12=0

We add all the numbers together, and all the variables

d-32=0

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

d=32

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