Neave had
25 as many erasers as Gem. After Neave gave away 75 erasers, he had 99 less erasers than Gem. How many erasers did Gem have?
| |
Neave |
Gem |
| Before |
2 u |
5 u |
| Change |
- 75 |
|
| After |
2 u - 75 |
5 u |
Gem had 99 more erasers than Neave in the end. So, if Neave had another 99 erasers, he would have the same number of erasers as Gem.
5 u = 2 u - 75 + 99
5 u - 2 u = 99 - 75
3 u = 24
1 u = 24 ÷ 3 = 8
Number of erasers that Gem had at first
= 5 u
= 5 x 8
= 40
Answer: 40
