300-40/x=140

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Solution for 300-40/x=140 equation: 


D( x )

x = 0

x = 0

x = 0

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

300-(40/x) = 140 // - 140

300-(40/x)-140 = 0

300-40*x^-1-140 = 0

-40*x^-1 = -160 // : -40

x^-1 = 4

-1 < 0

1/(x^1) = 4 // * x^1

1 = 4*x^1 // : 4

1/4 = x^1

x = 1/4

x = 1/4

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