John and Glen had the same number of stamps. John gave away
34 of his stamps while Glen gave away
35 of his stamps. Given that John gave away 12 stamps more than Glen, how many stamps did John have at first?
| |
John's stamps |
Glen's stamps |
| Before |
4x5 =
20 u |
5x4 =
20 u |
| Change |
- 3x5 =
- 15 u |
- 3x4 =
- 12 u |
| After |
1x5 =
5 u |
2x4 =
8 u |
The number of cards that John and Glen each had at first is the same. Make the number of cards that John and Glen each had at first the same. LCM of 4 and 5 is 20.
Number of stamps that John gave away more than Glen
= 15 u - 12 u
= 3 u
3 u = 12
1 u = 12 ÷ 3 = 4
Number of stamps that John had at first
= 20 u
= 20 x 4
= 80
Answer(s): 80
