Sean had
38 the number of stamps that Michael had at first. After Michael gave Sean 68 of his stamps, Sean had
45 the number of stamps that Michael had. How many stamps did Sean have at first?
|
Sean |
Michael |
Total |
Before |
3x9 = 27 u |
8x9 = 72 u |
11x9 = 99 u |
Change |
+ 17 u |
- 17 u |
|
After |
4x11 = 44 u |
5x11 = 55 u |
9x11 = 99 u |
The total number of stamps that Sean and Michael had at first and in the end remains unchanged. Make the total number of stamps the same. LCM of 11 and 9 is 99.
Number of stamps that Michael gave Sean
= 44 u - 27 u
= 17 u
17 u = 68
1 u = 68 ÷ 17 = 4
Number of stamps that Sean had at first
= 27 u
= 27 x 4
= 108
Answer(s): 108