6d-7=20-d

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Solution for 6d-7=20-d equation: 



6d-7=20-d

We move all terms to the left:

6d-7-(20-d)=0

We add all the numbers together, and all the variables

6d-(-1d+20)-7=0

We get rid of parentheses

6d+1d-20-7=0

We add all the numbers together, and all the variables

7d-27=0

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

7d=27

d=27/7

d=3+6/7

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