Tina, Cindy and Shiyun had a total of 267 cards. Tina gave
38 of her cards away. Shiyun gave away 3 times as many cards as Tina and Cindy gave away 30 cards. In the end, they had 189 cards left. How many cards did Cindy and Shiyun have in total in the end?
| |
Tina |
Cindy |
Shiyun |
Total |
| Before |
8 u |
? |
? |
267 |
| Change |
- 3 u |
- 30 |
- 9 u |
- 78 |
| After |
5 u |
? |
189 |
Number of cards that Shiyun gave away
= 3 x 3 u
= 9 u
Number of cards given away
= 3 u + 30 + 9 u
= 12 u + 30
12 u + 30 = 267 - 189
12 u = 78 - 30
12 u = 48
1 u = 48 ÷ 12 = 4
Number of cards that Cindy and Shiyun had in the end
= 189 - 5 u
= 189 - 5 x 4
= 189 - 20
= 169
Answer(s): 169
