Solve the following pairs of equations:
$\frac{1}{2x} - \frac{1}{y} = -1$
$\frac{1}{x} + \frac{1}{2y} = 8, \quad x, y \neq 0$

  • A
    $\frac{1}{5}, \frac{1}{4}$
  • B
    $\frac{1}{6}, \frac{1}{4}$
  • C
    $\frac{1}{6}, \frac{1}{5}$
  • D
    $\frac{1}{5}, \frac{1}{9}$

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