40/2=85/m

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Solution for 40/2=85/m equation: 


D( m )

m = 0

m = 0

m = 0

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

40/2 = 85/m // - 85/m

40/2-(85/m) = 0

40/2-85*m^-1 = 0

-85*m^-1 = -20 // : -85

m^-1 = 4/17

-1 < 0

1/(m^1) = 4/17 // * m^1

1 = 4/17*m^1 // : 4/17

17/4 = m^1

m = 17/4

m = 17/4

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