Albert and Mary shared some erasers equally. After Mary bought 100 erasers and Albert gave 194 erasers away, they had 274 erasers left. How many erasers did each of them have at first?
| |
Albert |
Mary |
Total |
| Before |
1 u |
1 u |
|
| Change |
+ 100 |
- 194 |
|
| After |
1 u + 100 |
1 u - 194 |
274 |
Albert and Mary had the same number of erasers at first.
Total number of erasers in the end
= 1 u + 100 + 1 u - 194
= 1 u + 1 u + 100 - 194
= 2 u - 94
2 u - 94 = 274
2 u = 274 + 94
2 u = 368
1 u = 368 ÷ 2 = 184
Number of erasers that each of them had at first
= 1 u
= 184
Answer(s): 184
