14/20=21/m

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Solution for 14/20=21/m equation: 


D( m )

m = 0

m = 0

m = 0

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

14/20 = 21/m // - 21/m

14/20-(21/m) = 0

14/20-21*m^-1 = 0

-21*m^-1 = -7/10 // : -21

m^-1 = 1/30

-1 < 0

1/(m^1) = 1/30 // * m^1

1 = 1/30*m^1 // : 1/30

30 = m^1

m = 30

m = 30

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