In the diagram, what is the value of $y$?

https://latex.artofproblemsolving.com/2/b/8/2b8ece06cd410a72e32cb7e92073374f4b987744.png

The missing angle in the left triangle has value 40^{o}.

Therefore, its vertical angle in the right triangle is also 40^{o}.

This leaves 50^{o} for the missing angle.

the link kind of dosn't work, tried to open it but only showed black, i waited but nothing so i cant help you srry but 50 degrees may be right