Yen and Kylie had an equal number of erasers at first. Yen used
15 of her erasers and Kylie used
16 of her erasers. They used 55 erasers altogether. How many erasers did Kylie have in the end?
|
Yen |
Kylie |
Before |
5x6 = 30 u |
6x5 = 30 u |
Change |
- 1x6 = - 6 u |
- 1x5 = - 5 u |
After |
4x6 = 24 u |
5x5 = 25 u |
The number of erasers that Yen and Kylie each had at first is the same. Make the number of erasers that Yen and Kylie each had at first the same. LCM of 5 and 6 is 30.
Number of erasers that Yen and Kylie used
= 6 u + 5 u
= 11 u
11 u = 55
1 u = 55 ÷ 11 = 5
Number of erasers that Kylie had in the end
= 25 u
= 25 x 5
= 125
Answer(s): 125