7d-6=30-2d

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Solution for 7d-6=30-2d equation: 



7d-6=30-2d

We move all terms to the left:

7d-6-(30-2d)=0

We add all the numbers together, and all the variables

7d-(-2d+30)-6=0

We get rid of parentheses

7d+2d-30-6=0

We add all the numbers together, and all the variables

9d-36=0

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

9d=36

d=36/9

d=4

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