(389-x)/x=0.4

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Solution for (389-x)/x=0.4 equation: 


D( x )

x = 0

x = 0

x = 0

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

(389-x)/x = 0.4 // - 0.4

(389-x)/x-0.4 = 0

(389-x)/x+(-0.4*x)/x = 0

389-x-0.4*x = 0

389-1.4*x = 0

(389-1.4*x)/x = 0

(389-1.4*x)/x = 0 // * x

389-1.4*x = 0

389-1.4*x = 0 // - 389

-1.4*x = -389 // : -1.4

x = -389/(-1.4)

x = 277.85714286

x = 277.85714286

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