Here you go!!! Hope this helps
Here's a diagram showing how to combine angles LDA (in red) and angle ADE (in blue). Hopefully it becomes a bit clearer why these two angles add up to line segment LE. Erase the shared segment DA if it helps show LE better.
See attached image below.
Answer:
<h2>z = 27°</h2>
Because that angle is 30°.
it's nearest value is 27.