Esther has 3 times as many cards as Xuan. Xuan has
47 as many cards as Emma. If the three of them have a total of 92 cards, how many cards does Emma have?
| Esther |
Xuan |
Emma |
| 3x4 |
1x4 |
|
| |
4x1 |
7x1 |
| 12 u |
4 u |
7 u |
The number of cards that Xuan has is repeated. Make the number of cards that Xuan has the same. LCM of 1 and 4 is 4.
Total number of cards that the three of them have
= 12 u + 4 u + 7 u
= 23 u
23 u = 92
1 u = 92 ÷ 23 = 4
Number of cards that Emma has
= 7 u
= 7 x 4
= 28
Answer(s): 28
