45/15=20/x

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Solution for 45/15=20/x equation: 


D( x )

x = 0

x = 0

x = 0

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

45/15 = 20/x // - 20/x

45/15-(20/x) = 0

45/15-20*x^-1 = 0

-20*x^-1 = -3 // : -20

x^-1 = 3/20

-1 < 0

1/(x^1) = 3/20 // * x^1

1 = 3/20*x^1 // : 3/20

20/3 = x^1

x = 20/3

x = 20/3

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