Opal had 150 more marbles than Emily. After Emily gave away
35 of her marbles, Opal had four times as many marbles as Emily. How many marbles did Emily have at first?
| |
Opal |
Emily |
Comparing Opal
and Emily at first |
150 more |
|
| Before |
8 u |
5 u |
| Change |
|
- 3 u |
| After |
|
2 u |
Comparing Opal
and Emily in the end |
4x2 =
8 u |
1x2 =
2 u |
The number of marbles that Opal had at first and in the end remains unchanged. Make the number of marbles that Opal had the same. LCM of 8 and 4 is 8.
Number of marbles that Opal had more than Emily at first
= 8 u - 5 u
= 3 u
3 u = 150
1 u = 150 ÷ 3 = 50
Number of marbles that Emily had at first
= 5 u
= 5 x 50
= 250
Answer(s): 250
