Jean had 36 more erasers than Fanny. After Fanny gave away
18 of her erasers, Jean had twice as many erasers as Fanny. How many erasers did Fanny have at first?
| |
Jean |
Fanny |
Comparing Jean and
Fanny at first |
36 more |
|
| Before |
14 u |
8 u |
| Change |
|
- 1 u |
| After |
14 u |
7 u |
Comparing Jean and
Fanny in the end |
2x7 =
14 u |
1x7 =
7 u |
Number of erasers that Fanny had in the end is repeated. Make the number of erasers that Fanny had in the end the same. LCM of 1 and 7 is 7.
Number of erasers that Jean had at first = 14 u
Number of erasers that Jean had more than Fanny at first
= 14 u - 8 u
= 6 u
6 u = 36
1 u = 36 ÷ 6 = 6
Number of erasers that Fanny had at first
= 8 u
= 8 x 6
= 48
Answer(s): 48
