5/9=7/d

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Solution for 5/9=7/d equation: 


D( d )

d = 0

d = 0

d = 0

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

5/9 = 7/d // - 7/d

5/9-(7/d) = 0

5/9-7*d^-1 = 0

-7*d^-1 = -5/9 // : -7

d^-1 = 5/63

-1 < 0

1/(d^1) = 5/63 // * d^1

1 = 5/63*d^1 // : 5/63

63/5 = d^1

d = 63/5

d = 63/5

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