Answer:
104°
This is because there are two lines, each line is 180°, so both is equal to 360°. Angle y and the one with 76° are the same, so that should mean angle z and x are the same. So you subtract 152° from 360° (76° doubled) and you get 208° leftover. Now to get the last two angles, you divide 208° by 2, so each angle should be 104°. :))
