Can you flip it? I don't think all of us can read in reverse.
I've only had algebra, but I have had proving statements. So as far as I can tell you have these:
JUC versus IUE and JUI versus CUE. Unless I'm mistaken, those denote the angles in the figure. So let's substitute a bit:
JUC = 1 + 2
IUE = 2 + 3
JUI = 1
CUE = 3
Since it asks a property, whatever that is, I'm assuming it's asking for an equation for angle 2, or IUC.