3/7d=9

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Solution for 3/7d=9 equation: 



3/7d=9

We move all terms to the left:

3/7d-(9)=0



Domain of the equation: 7d!=0

d!=0/7

d!=0

d∈R



We multiply all the terms by the denominator


-9*7d+3=0

Wy multiply elements

-63d+3=0

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

-63d=-3

d=-3/-63

d=1/21

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