Answer: 13
Explanation:
Because of the laws of circles BD = DF and EG = AC (They are chords and are at a equal distant from each other).
3x + 4 = 5x - 8
-2x = -12
x = 6
EG = 5x - 4
5(6) - 4
30 - 4
26
Because the chrod is cut in half by line BD we divide 26 by 2
26 / 2
13