L + w = 66/2 =33
(6 + 8w) + w =33
9w = 27
w = 3
5 elves*5 minutes=5 dolls
1 elf *5 minutes=1 doll
so it takes 5 minutes for an elf to make doll
100 elves*100 minutes/5=100*20=2000 dolls in 100 minutes by 100 elves
Well it would be C! so 78-74=4 so they are counting by 4's and 86+4=90 :33