72/x=80/100

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Solution for 72/x=80/100 equation: 


D( x )

x = 0

x = 0

x = 0

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

72/x = 80/100 // - 80/100

72/x-(80/100) = 0

72/x-4/5 = 0

72*x^-1 = 4/5 // : 72

x^-1 = 1/90

-1 < 0

1/(x^1) = 1/90 // * x^1

1 = 1/90*x^1 // : 1/90

90 = x^1

x = 90

x = 90

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