Flynn had
58 the number of erasers that Ethan had at first. After Ethan gave Flynn 35 of his erasers, Flynn had
45 the number of erasers that Ethan had. How many erasers did Flynn have at first?
| |
Flynn |
Ethan |
Total |
| Before |
5x9 =
45 u |
8x9 =
72 u |
13x9 =
117 u |
| Change |
+ 7 u |
- 7 u |
|
| After |
4x13 =
52 u |
5x13 =
65 u |
9x13 =
117 u |
The total number of erasers that Flynn and Ethan had at first and in the end remains unchanged. Make the total number of erasers the same. LCM of 13 and 9 is 117.
Number of erasers that Ethan gave Flynn
= 52 u - 45 u
= 7 u
7 u = 35
1 u = 35 ÷ 7 = 5
Number of erasers that Flynn had at first
= 45 u
= 45 x 5
= 225
Answer(s): 225
