3d+20=-9d-20-20

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Solution for 3d+20=-9d-20-20 equation: 



3d+20=-9d-20-20

We move all terms to the left:

3d+20-(-9d-20-20)=0

We add all the numbers together, and all the variables

3d-(-9d-40)+20=0

We get rid of parentheses

3d+9d+40+20=0

We add all the numbers together, and all the variables

12d+60=0

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

12d=-60

d=-60/12

d=-5

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