Daniel and Marion shared some erasers equally. After Marion bought 74 erasers and Daniel gave 112 erasers away, they had 372 erasers left. How many erasers did each of them have at first?
| |
Daniel |
Marion |
Total |
| Before |
1 u |
1 u |
|
| Change |
+ 74 |
- 112 |
|
| After |
1 u + 74 |
1 u - 112 |
372 |
Daniel and Marion had the same number of erasers at first.
Total number of erasers in the end
= 1 u + 74 + 1 u - 112
= 1 u + 1 u + 74 - 112
= 2 u - 38
2 u - 38 = 372
2 u = 372 + 38
2 u = 410
1 u = 410 ÷ 2 = 205
Number of erasers that each of them had at first
= 1 u
= 205
Answer(s): 205
