(x-90)/x=0.1

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Solution for (x-90)/x=0.1 equation: 


D( x )

x = 0

x = 0

x = 0

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

(x-90)/x = 0.1 // - 0.1

(x-90)/x-0.1 = 0

(x-90)/x+(-0.1*x)/x = 0

x-0.1*x-90 = 0

0.9*x-90 = 0

(0.9*x-90)/x = 0

(0.9*x-90)/x = 0 // * x

0.9*x-90 = 0

0.9*x-90 = 0 // + 90

0.9*x = 90 // : 0.9

x = 90/0.9

x = 100

x = 100

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