Elyse and Erika had an equal number of buttons at first. After Elyse gave 3 buttons to Erika, Erika had 21 buttons. How many buttons does Elyse have in the end?
| |
Elyse |
Erika |
| Before |
1 u |
1 u |
| Change |
- 3 |
+ 3 |
| After |
1 u - 3 |
21 |
Number of buttons that Erika had at first
= 21 - 3
= 18
1 u = 18
Number of buttons that Elyse had at first = 18
Number of buttons that Elyse had in the end
= 1 u - 3
= 18 - 3
= 15
Answer(s): 15
