Fred and Pamela shared some erasers equally. After Pamela bought 40 erasers and Fred gave 99 erasers away, they had 529 erasers left. How many erasers did each of them have at first?
| |
Fred |
Pamela |
Total |
| Before |
1 u |
1 u |
|
| Change |
+ 40 |
- 99 |
|
| After |
1 u + 40 |
1 u - 99 |
529 |
Fred and Pamela had the same number of erasers at first.
Total number of erasers in the end
= 1 u + 40 + 1 u - 99
= 1 u + 1 u + 40 - 99
= 2 u - 59
2 u - 59 = 529
2 u = 529 + 59
2 u = 588
1 u = 588 ÷ 2 = 294
Number of erasers that each of them had at first
= 1 u
= 294
Answer(s): 294
