Question

$\frac{1}{2x} - \: \frac{1}{y} \: = - 1 \: \: solve$
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Answer 1

$\frac{1}{2x} - \frac{1}{y} = - 1 \\ taking \: lcm \: \\ y - 2x \: = - y \\ 2y = 2x \\ y = x$