90/x-20+90/x=1

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Solution for 90/x-20+90/x=1 equation: 


D( x )

x = 0

x = 0

x = 0

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

90/x+90/x-20 = 1 // - 1

90/x+90/x-20-1 = 0

180*x^-1 = 21 // : 180

x^-1 = 7/60

-1 < 0

1/(x^1) = 7/60 // * x^1

1 = 7/60*x^1 // : 7/60

60/7 = x^1

x = 60/7

x = 60/7

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