7d=5d-20

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Solution for 7d=5d-20 equation: 



7d=5d-20

We move all terms to the left:

7d-(5d-20)=0

We get rid of parentheses

7d-5d+20=0

We add all the numbers together, and all the variables

2d+20=0

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

2d=-20

d=-20/2

d=-10

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