7d=15+3d

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Solution for 7d=15+3d equation: 



7d=15+3d

We move all terms to the left:

7d-(15+3d)=0

We add all the numbers together, and all the variables

7d-(3d+15)=0

We get rid of parentheses

7d-3d-15=0

We add all the numbers together, and all the variables

4d-15=0

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

4d=15

d=15/4

d=3+3/4

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