Wendy and Elyse have some shortbreads each. If Wendy gives Elyse 27 shortbreads, Wendy will have
14 as many shortbreads as Elyse. If Wendy gives Elyse 19 shortbreads, they will have an equal number of shortbreads. How many shortbreads does Wendy have at first?
|
Case 1 |
Case 2 |
|
Wendy |
Elyse |
Wendy |
Elyse |
Before |
1 u + 27 |
4 u - 27 |
2.5 u + 19 |
2.5 u - 19 |
Change |
- 27 |
+ 27 |
- 19 |
+ 19 |
After |
1 u |
4 u |
2.5 u |
2.5 u |
Total number of shortbreads that Wendy and Elyse have
= 1 u + 4 u
= 5 u
Number of shortbreads that Wendy and Elyse each has in the end is the same.
Number of shortbreads that Wendy and Elyse each has in the end in Case 2
= 5 u ÷ 2
= 2.5 u
Number of shortbreads that Wendy had at first is the same in Case 1 and Case 2.
2.5 u + 19 = 1 u + 27
2.5 u - 1 u = 27 - 19
0.5 u = 8
1 u = 8 ÷ 0.5 = 16
Number of shortbreads that Wendy has
= 1 u + 27
= 1 x 16 + 27
= 16 + 27
= 43
Answer(s): 43