Simon and Fred had the same number of stamps. Simon gave away
45 of his stamps while Fred gave away
23 of his stamps. Given that Simon gave away 12 stamps more than Fred, how many stamps did Simon have at first?
| |
Simon's stamps |
Fred's stamps |
| Before |
5x3 =
15 u |
3x5 =
15 u |
| Change |
- 4x3 =
- 12 u |
- 2x5 =
- 10 u |
| After |
1x3 =
3 u |
1x5 =
5 u |
The number of cards that Simon and Fred each had at first is the same. Make the number of cards that Simon and Fred each had at first the same. LCM of 5 and 3 is 15.
Number of stamps that Simon gave away more than Fred
= 12 u - 10 u
= 2 u
2 u = 12
1 u = 12 ÷ 2 = 6
Number of stamps that Simon had at first
= 15 u
= 15 x 6
= 90
Answer(s): 90
