Opal had 32 more erasers than Lynn. After Lynn gave away
27 of her erasers, Opal had thrice as many erasers as Lynn. How many erasers did Lynn have at first?
| |
Opal |
Lynn |
Comparing Opal and
Lynn at first |
32 more |
|
| Before |
15 u |
7 u |
| Change |
|
- 2 u |
| After |
15 u |
5 u |
Comparing Opal and
Lynn in the end |
3x5 =
15 u |
1x5 =
5 u |
Number of erasers that Lynn had in the end is repeated. Make the number of erasers that Lynn had in the end the same. LCM of 1 and 5 is 5.
Number of erasers that Opal had at first = 15 u
Number of erasers that Opal had more than Lynn at first
= 15 u - 7 u
= 8 u
8 u = 32
1 u = 32 ÷ 8 = 4
Number of erasers that Lynn had at first
= 7 u
= 7 x 4
= 28
Answer(s): 28
