## Precalculus (6th Edition)

$x=z\sigma+\mu$
$z=\dfrac{x-\mu}{\sigma}$ $,$ for $x$ Take $\sigma$ to multiply the left side: $z\sigma=x-\mu$ Take $\mu$ to the left side: $z\sigma+\mu=x$ Rearrange: $x=z\sigma+\mu$