Mrs Loo gave Joelle and Roshel some money each on Monday. On Tuesday, Joelle gave ¹₅ of the amount she had to Roshel. On Wednesday, Roshel gave ¹₃ of the amount she had to Joelle. In the end, Joelle had $40 and Roshel had $24. How much did Roshel had more than Joelle at first?

	Joelle	Roshel	Total
Before 1	5 u	?	$64
Change 1	- 1 u	+ 1 u
After 1	4 u	3 p	$64
Before 2	$40 - 1 p	3 p	$64
Change 2	+ 1 p	- 1 p
After 2	$40	2 p ($24)	$64

Amount that Roshel had in the end = 2 p

2 p = 24

1 p = 24 ÷ 2 = 12

Working backwards.

Amount that Joelle had after giving to Roshel on Tuesday
= 40 - 1 p
= 40 - 12
= $28

4 u = 28

1 u = 28 ÷ 4 = 7

Amount that Joelle had at first
= 5 u
= 5 x 7
= $35

Total amount that Joelle and Roshel had 
= 40 + 24
= $64

Amount that Roshel had at first
= 64 - 35
= $29

Amount that Joelle had more than Roshel
= 35 - 29 
= $6

Answer(s): $6