## Prealgebra (7th Edition)

$z=-120$
$\frac{z}{4}=-23-7\rightarrow$ simplify $\frac{z}{4}=-30\rightarrow$ multiply both sides by 4 $\frac{z}{4}\times4=-30\times4\rightarrow$ simplify $z=-120$ Check the solution by plugging in the value for z and determine whether the resulting equation is true. $\frac{-120}{4}=-23-7\rightarrow$ simplify $-30=-30$ This is true so the solution is correct.