8,18,4.6,10,14.16,2,12; 24,9,12.3,15,27.18,21,6; 16,36,8.12,20,28.32,4,24.
(0.8x+x+9x/5)/3=8.4
(1.8x+9x/5)=25.2
19/5x=25.2
x=126/19