12d-20=20-3d+20

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Solution for 12d-20=20-3d+20 equation: 



12d-20=20-3d+20

We move all terms to the left:

12d-20-(20-3d+20)=0

We add all the numbers together, and all the variables

12d-(-3d+40)-20=0

We get rid of parentheses

12d+3d-40-20=0

We add all the numbers together, and all the variables

15d-60=0

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

15d=60

d=60/15

d=4

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