What is 1/3h-4(2/3h-3)=2/3h-6
1/3 h - 8/3 h + 12 = 2/3 h - 6-7/3 h + 12 = 2/3 h - 6-9/3 h = - 18-3 h = -18 h = 18/3 = 6