Answer:
15
Step-by-step explanation:
GH = (BC + FE) /2
9x-3 = (19+ 5x+1) /2
2* (9x-3) = 19+ 5x+1
18 x - 6 = 5x + 20
13x = 26
x = 2
GH = 9*2 - 3 = 15
