2/6=7/d

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Solution for 2/6=7/d equation: 


D( d )

d = 0

d = 0

d = 0

d in (-oo:0) U (0:+oo)

2/6 = 7/d // - 7/d

2/6-(7/d) = 0

2/6-7*d^-1 = 0

-7*d^-1 = -1/3 // : -7

d^-1 = 1/21

-1 < 0

1/(d^1) = 1/21 // * d^1

1 = 1/21*d^1 // : 1/21

21 = d^1

d = 21

d = 21

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