Question

$$1/x=1/y-1/z$$

Solve for x

$x=-\frac{yz}{y-z}$
$z\neq 0\text{ and }y\neq 0\text{ and }y\neq z$

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Solve for y

$y=\frac{xz}{x+z}$
$z\neq 0\text{ and }x\neq 0\text{ and }x\neq -z$

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