-61=61*ln(x/120)

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Solution for -61=61*ln(x/120) equation: 


D( x )

x/120 <= 0

x/120 <= 0

x/120 <= 0

1/120*x+0 <= 0 // - 0

1/120*x <= 0 // : 1/120

x <= 0/1/120

x <= 0

x in (0:+oo)

-61 = 61*ln(x/120) // - 61*ln(x/120)

-(61*ln(x/120))-61 = 0

-61*ln(x/120)-61 = 0

-61*ln(x/120)-61 = 0 // + 61

-61*ln(x/120) = 61 // : -61

ln(x/120) = 61/(-61)

ln(x/120) = -1

ln(x/120) = ln(e^-1)

x/120 = e^-1

x/120-e^-1 = 0

1/120*x-e^-1 = 0 // + e^-1

1/120*x = e^-1 // : 1/120

x = (e^-1)/1/120

x = 120*e^-1

x = 120*e^-1

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