8/10=40/d

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Solution for 8/10=40/d equation: 


D( d )

d = 0

d = 0

d = 0

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

8/10 = 40/d // - 40/d

8/10-(40/d) = 0

8/10-40*d^-1 = 0

-40*d^-1 = -4/5 // : -40

d^-1 = 1/50

-1 < 0

1/(d^1) = 1/50 // * d^1

1 = 1/50*d^1 // : 1/50

50 = d^1

d = 50

d = 50

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