-2y/x=7

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Solution for -2y/x=7 equation: 


D( x )

x = 0

x = 0

x = 0

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

(-2*y)/x = 7 // - 7

(-2*y)/x-7 = 0

-2*x^-1*y = 7 // : -2*y

x^-1 = 7/(-2*y)

-1 < 0

1/(x^1) = 7/(-2*y) // * x^1

1 = x^1*(7/(-2*y)) // : 7/(-2*y)

(-2*y)/7 = x^1

x = (-2*y)/7

x = (-2*y)/7

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