Julie had 40 more pens than Linda. After Linda gave away
25 of her pens, Julie had thrice as many pens as Linda. How many pens did Linda have at first?
| |
Julie |
Linda |
Comparing Julie and
Linda at first |
40 more |
|
| Before |
9 u |
5 u |
| Change |
|
- 2 u |
| After |
9 u |
3 u |
Comparing Julie and
Linda in the end |
3x3 =
9 u |
1x3 =
3 u |
Number of pens that Linda had in the end is repeated. Make the number of pens that Linda had in the end the same. LCM of 1 and 3 is 3.
Number of pens that Julie had at first = 9 u
Number of pens that Julie had more than Linda at first
= 9 u - 5 u
= 4 u
4 u = 40
1 u = 40 ÷ 4 = 10
Number of pens that Linda had at first
= 5 u
= 5 x 10
= 50
Answer(s): 50
