Answer
$\angle x\ and\ \angle z\ are\ 141^o$
$\angle y\ is\ 39^o$
Work Step by Step
When parallel lines are cut by a transversal, corresponding angles are equal. $\angle y$ is equal to the $39^o$ angle.
$\angle x$ and the $39^o$ angle are supplementary.
$\angle x=180^o-39^o=141^o$
$\angle z$ and $\angle y $ are supplementary.
$\angle z=180^o-39^o=141^o$