3(2d+7)=3d

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Solution for 3(2d+7)=3d equation: 



3(2d+7)=3d

We move all terms to the left:

3(2d+7)-(3d)=0

We add all the numbers together, and all the variables

-3d+3(2d+7)=0

We multiply parentheses

-3d+6d+21=0

We add all the numbers together, and all the variables

3d+21=0

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

3d=-21

d=-21/3

d=-7

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