Xandra and Esther have some wafers each. If Xandra gives Esther 11 wafers, Xandra will have ¹₂ as many wafers as Esther. If Xandra gives Esther 2 wafers, they will have an equal number of wafers. How many wafers does Xandra have at first?

	Case 1		Case 2
	Xandra	Esther	Xandra	Esther
Before	1 u + 11	2 u - 11	1.5 u + 2	1.5 u - 2
Change	- 11	+ 11	- 2	+ 2
After	1 u	2 u	1.5 u	1.5 u

Total number of wafers that Xandra and Esther have
= 1 u + 2 u
= 3 u 

Number of wafers that Xandra and Esther each has in the end is the same.

Number of wafers that Xandra and Esther each has in the end in Case 2
= 3 u ÷ 2
= 1.5 u

Number of wafers that Xandra had at first is the same in Case 1 and Case 2.

1.5 u + 2 = 1 u + 11
1.5 u - 1 u = 11 - 2
0.5 u = 9

1 u = 9 ÷ 0.5 = 18

Number of wafers that Xandra has
= 1 u + 11
= 1 x 18 + 11
= 18 + 11
= 29

Answer(s): 29