Justin and Tommy had 83 biscuits altogether. After Justin ate ¹₄ of his biscuits and Tommy ate 3 biscuits, the number of biscuits Tommy had left was twice the number of biscuits Justin had left. How many more biscuits did Tommy have than Justin at first?

	Justin	Tommy	Total
Before	4 u	6 u + 3	83
Change	- 1 u	- 3
After	3 u
Comparing Justin and Tommy in the end	1x3 = 3 u	2x3 = 6 u

The number of biscuits that Justin had in the end is the same. Make the number of biscuits that Justin had in the end the same.  LCM of 3 and 1 is 3.

Total number of biscuits at first
= 4 u + 6 u + 3
= 10 u + 3

10 u + 3 = 83
10 u = 83 - 3
10 u = 80 

1 u = 80 ÷ 10 = 8

Number of biscuits that Justin had at first
= 4 u
= 4 x 8
= 32

Number of biscuits that Tommy had at first
= 83 - 32
= 51

Number of biscuits that Tommy had more than Justin at first
= 51 - 32
= 19

Answer(s): 19