7=3d+20

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Solution for 7=3d+20 equation: 



7=3d+20

We move all terms to the left:

7-(3d+20)=0

We get rid of parentheses

-3d-20+7=0

We add all the numbers together, and all the variables

-3d-13=0

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

-3d=13

d=13/-3

d=-4+1/3

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