#### Answer

$z=20$

#### Work Step by Step

$32z+11-28z=50+2z-(-1)$ $\longrightarrow$combine like terms
$4z+11=51+2z$ $\longrightarrow$addition property
$4z+11-11-2z=51+2z-11-2z$ $\longrightarrow$combine like terms
$2z=40$ $\longrightarrow$multiplication property
$2z\div2=40\div2$ $\longrightarrow$simplify
$z=20$