Joelle had 24 more pens than Linda. After Linda gave away
13 of her pens, Joelle had thrice as many pens as Linda. How many pens did Linda have at first?
| |
Joelle |
Linda |
Comparing Joelle and
Linda at first |
24 more |
|
| Before |
6 u |
3 u |
| Change |
|
- 1 u |
| After |
6 u |
2 u |
Comparing Joelle and
Linda in the end |
3x2 =
6 u |
1x2 =
2 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 2 is 2.
Number of pens that Joelle had at first = 6 u
Number of pens that Joelle had more than Linda at first
= 6 u - 3 u
= 3 u
3 u = 24
1 u = 24 ÷ 3 = 8
Number of pens that Linda had at first
= 3 u
= 3 x 8
= 24
Answer(s): 24
