Fabian had
25 the number of erasers that Elijah had at first. After Elijah gave Fabian 100 of his erasers, Fabian had
45 the number of erasers that Elijah had. How many erasers did Elijah have in the end?
|
Fabian |
Elijah |
Total |
Before |
2x9 = 18 u |
5x9 = 45 u |
7x9 = 63 u |
Change |
+ 10 u |
- 10 u |
|
After |
4x7 = 28 u |
5x7 = 35 u |
9x7 = 63 u |
The total number of erasers that Fabian and Elijah had at first and in the end remains unchanged. Make the total number of erasers the same. LCM of 7 and 9 is 63.
Number of erasers that Elijah gave Fabian
= 28 u - 18 u
= 10 u
10 u = 100
1 u = 100 ÷ 10 = 10
Number of erasers that Elijah had in the end
= 35 u
= 35 x 10
= 350
Answer(s): 350