7/x=y/9

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Solution for 7/x=y/9 equation: 


D( x )

x = 0

x = 0

x = 0

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

7/x = y/9 // - y/9

7/x-(y/9) = 0

7*x^-1 = -(-1/9*y) // : 7

x^-1 = 1/63*y

-1 < 0

1/(x^1) = 1/63*y // * x^1

1 = 1/63*x^1*y // : 1/63*y

63*y^-1 = x^1

x = 63*y^-1

x = 63*y^-1

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