-4/9=7/x

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Solution for -4/9=7/x equation: 


D( x )

x = 0

x = 0

x = 0

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

-4/9 = 7/x // - 7/x

-(7/x)-4/9 = 0

-7*x^-1-4/9 = 0

-7*x^-1 = 4/9 // : -7

x^-1 = -4/63

-1 < 0

1/(x^1) = -4/63 // * x^1

1 = -4/63*x^1 // : -4/63

-63/4 = x^1

x = -63/4

x = -63/4

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