420/d=30

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Solution for 420/d=30 equation: 


D( d )

d = 0

d = 0

d = 0

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

420/d = 30 // - 30

420/d-30 = 0

420*d^-1 = 30 // : 420

d^-1 = 1/14

-1 < 0

1/(d^1) = 1/14 // * d^1

1 = 1/14*d^1 // : 1/14

14 = d^1

d = 14

d = 14

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