Ethan and Diana shared some stamps equally. After Diana bought 51 stamps and Ethan gave 196 stamps away, they had 325 stamps left. How many stamps did each of them have at first?
| |
Ethan |
Diana |
Total |
| Before |
1 u |
1 u |
|
| Change |
+ 51 |
- 196 |
|
| After |
1 u + 51 |
1 u - 196 |
325 |
Ethan and Diana had the same number of stamps at first.
Total number of stamps in the end
= 1 u + 51 + 1 u - 196
= 1 u + 1 u + 51 - 196
= 2 u - 145
2 u - 145 = 325
2 u = 325 + 145
2 u = 470
1 u = 470 ÷ 2 = 235
Number of stamps that each of them had at first
= 1 u
= 235
Answer(s): 235
