90/x=40/100

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Solution for 90/x=40/100 equation: 


D( x )

x = 0

x = 0

x = 0

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

90/x = 40/100 // - 40/100

90/x-(40/100) = 0

90/x-2/5 = 0

90*x^-1 = 2/5 // : 90

x^-1 = 1/225

-1 < 0

1/(x^1) = 1/225 // * x^1

1 = 1/225*x^1 // : 1/225

225 = x^1

x = 225

x = 225

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