3(d=7)=39

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Solution for 3(d=7)=39 equation: 



3(d=7)=39

We move all terms to the left:

3(d-(7))=0

We multiply parentheses

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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