Eric and Cody had 63 notebooks. After Eric gave 22 notebooks to Cody. Cody, in return, gave half of his notebooks to Eric. In the end, Eric had twice as many notebooks as Cody. How many notebooks did Eric have at first?
| |
Eric |
Cody |
Total |
| Before |
1 u + 22 |
2 u - 22 |
63 |
| Change 1 |
- 22 |
+ 22 |
|
| After 1 |
1 u |
2 u |
|
| Change 2 |
+ 1 u |
- 1 u |
|
| After 2 |
2 u |
1 u |
63 |
Total number of notebooks that Eric and Cody had at first and in the end remains unchanged.
Total number of notebooks
= 2 u + 1 u
= 3 u
1 u = 63 ÷ 3 = 21
Number of notebooks that Eric had at first
= 1 u + 22
= 21 + 22
= 43
Answer(s): 43
