Vanessa had 63 more erasers than Emma. After Emma gave away
35 of her erasers, Vanessa had four times as many erasers as Emma. How many erasers did Emma have at first?
| |
Vanessa |
Emma |
Comparing Vanessa
and Emma at first |
63 more |
|
| Before |
8 u |
5 u |
| Change |
|
- 3 u |
| After |
|
2 u |
Comparing Vanessa
and Emma in the end |
4x2 =
8 u |
1x2 =
2 u |
The number of erasers that Vanessa had at first and in the end remains unchanged. Make the number of erasers that Vanessa had the same. LCM of 8 and 4 is 8.
Number of erasers that Vanessa had more than Emma at first
= 8 u - 5 u
= 3 u
3 u = 63
1 u = 63 ÷ 3 = 21
Number of erasers that Emma had at first
= 5 u
= 5 x 21
= 105
Answer(s): 105
