Brandon and Winnie shared some coins equally. After Winnie bought 51 coins and Brandon gave 198 coins away, they had 215 coins left. How many coins did each of them have at first?
| |
Brandon |
Winnie |
Total |
| Before |
1 u |
1 u |
|
| Change |
+ 51 |
- 198 |
|
| After |
1 u + 51 |
1 u - 198 |
215 |
Brandon and Winnie had the same number of coins at first.
Total number of coins in the end
= 1 u + 51 + 1 u - 198
= 1 u + 1 u + 51 - 198
= 2 u - 147
2 u - 147 = 215
2 u = 215 + 147
2 u = 362
1 u = 362 ÷ 2 = 181
Number of coins that each of them had at first
= 1 u
= 181
Answer(s): 181
