Fred and Shiyun had the same number of chocolate bars. After Shiyun gave away 15 chocolate bars and Fred gave away 46 chocolate bars, Shiyun had 2 times as many chocolate bars as Fred. How many chocolate bars did each of them have at first?
| |
Fred |
Shiyun |
| Before |
1 u + 46 |
2 u + 15 |
| Change |
- 46 |
- 15 |
| After |
1 u |
2 u |
The number of chocolate bars that Fred and Shiyun had at first is the same.
2 u + 15 = 1 u + 46
2 u - 1 u = 46 - 15
1 u = 31
1 u = 31 ÷ 1 = 31
Number of chocolate bars that each of them had at first
= 1 u + 46
= 31 + 46
= 77
Answer(s): 77
