Risa had 154 more marbles than Jade. After Jade gave away
14 of her marbles, Risa had twice as many marbles as Jade. How many marbles did Jade have at first?
| |
Risa |
Jade |
Comparing Risa
and Jade at first |
154 more |
|
| Before |
6 u |
4 u |
| Change |
|
- 1 u |
| After |
|
3 u |
Comparing Risa
and Jade in the end |
2x3 =
6 u |
1x3 =
3 u |
The number of marbles that Risa had at first and in the end remains unchanged. Make the number of marbles that Risa had the same. LCM of 6 and 2 is 6.
Number of marbles that Risa had more than Jade at first
= 6 u - 4 u
= 2 u
2 u = 154
1 u = 154 ÷ 2 = 77
Number of marbles that Jade had at first
= 4 u
= 4 x 77
= 308
Answer(s): 308
