120*4/x=80

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Solution for 120*4/x=80 equation: 


D( x )

x = 0

x = 0

x = 0

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

(4*120)/x = 80 // - 80

(4*120)/x-80 = 0

480*x^-1 = 80 // : 480

x^-1 = 1/6

-1 < 0

1/(x^1) = 1/6 // * x^1

1 = 1/6*x^1 // : 1/6

6 = x^1

x = 6

x = 6

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