When we have $x = (y-z)/z$, how can we wrote $z$ as a function of $x$ and $y$? $z = ?$
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Originally Posted by brianx When we have $x = (y-z)/z$, how can we wrote $z$ as a function of $x$ and $y$? $z = ?$ $ \begin{align*}x&=\dfrac{y-z}{z} \\xz&=y-z\\xz+z&=y\\(x+1)z&=y\\z&=? \end{align*}$
zx = y - z zx + z = y z(x+1) = y z = y / (x+1)