Question

$-20 = \frac{z}{10}-22$

Explanation:

Step1: Add 22 to both sides

$-20 + 22=\frac{z}{10}-22 + 22$
$2=\frac{z}{10}$

Step2: Multiply both sides by 10

$2\times10=\frac{z}{10}\times10$
$z = 20$

Answer:

$z = 20$