280/(4x/5)-280/x=4

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Solution for 280/(4x/5)-280/x=4 equation: 


D( x )

(4*x)/5 = 0

x = 0

(4*x)/5 = 0

(4*x)/5 = 0

4/5*x = 0 // : 4/5

x = 0

x = 0

x = 0

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

280/((4*x)/5)-(280/x) = 4 // - 4

280/((4*x)/5)-(280/x)-4 = 0

280/((4*x)/5)-280*x^-1-4 = 0

70*x^-1 = 4 // : 70

x^-1 = 2/35

-1 < 0

1/(x^1) = 2/35 // * x^1

1 = 2/35*x^1 // : 2/35

35/2 = x^1

x = 35/2

x = 35/2

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