Vincent had
25 as many stamps as Cathy. After Vincent gave away 17 stamps, he had 74 less stamps than Cathy. How many stamps did Cathy have?
| |
Vincent |
Cathy |
| Before |
2 u |
5 u |
| Change |
- 17 |
|
| After |
2 u - 17 |
5 u |
Cathy had 74 more stamps than Vincent in the end. So, if Vincent had another 74 stamps, he would have the same number of stamps as Cathy.
5 u = 2 u - 17 + 74
5 u - 2 u = 74 - 17
3 u = 57
1 u = 57 ÷ 3 = 19
Number of stamps that Cathy had at first
= 5 u
= 5 x 19
= 95
Answer: 95
