Charlie and Gem shared some erasers equally. After Gem bought 81 erasers and Charlie gave 95 erasers away, they had 252 erasers left. How many erasers did each of them have at first?
| |
Charlie |
Gem |
Total |
| Before |
1 u |
1 u |
|
| Change |
+ 81 |
- 95 |
|
| After |
1 u + 81 |
1 u - 95 |
252 |
Charlie and Gem had the same number of erasers at first.
Total number of erasers in the end
= 1 u + 81 + 1 u - 95
= 1 u + 1 u + 81 - 95
= 2 u - 14
2 u - 14 = 252
2 u = 252 + 14
2 u = 266
1 u = 266 ÷ 2 = 133
Number of erasers that each of them had at first
= 1 u
= 133
Answer(s): 133
