16x + 8 8x+4 = 180 (opposite angles in a cyclic quadrilateral sum upto 180 degrees)
=> 24 x + 12 = 180
=> 24x = 180 - 12
=> 24x = 168
=> x = 168/24
=> x = 7
angle DAB = 16x + 8 = 16 times 7 +8 = 112+8 = 120 degrees
in short your answer is 120 degrees