(20*x-20*15)/x=40000

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Solution for (20*x-20*15)/x=40000 equation: 


D( x )

x = 0

x = 0

x = 0

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

(20*x-(15*20))/x = 40000 // - 40000

(20*x-(15*20))/x-40000 = 0

(20*x-300)/x-40000 = 0

(20*x-300)/x+(-40000*x)/x = 0

20*x-40000*x-300 = 0

-39980*x-300 = 0

(-39980*x-300)/x = 0

(-39980*x-300)/x = 0 // * x

-39980*x-300 = 0

-39980*x-300 = 0 // + 300

-39980*x = 300 // : -39980

x = 300/(-39980)

x = -15/1999

x = -15/1999

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