Min, Zoe and Lucy had a total of 187 cards. Min gave
13 of her cards away. Lucy gave away 3 times as many cards as Min and Zoe gave away 33 cards. In the end, they had 126 cards left. How many cards did Zoe and Lucy have in total in the end?
| |
Min |
Zoe |
Lucy |
Total |
| Before |
3 u |
? |
? |
187 |
| Change |
- 1 u |
- 33 |
- 3 u |
- 61 |
| After |
2 u |
? |
126 |
Number of cards that Lucy gave away
= 3 x 1 u
= 3 u
Number of cards given away
= 1 u + 33 + 3 u
= 4 u + 33
4 u + 33 = 187 - 126
4 u = 61 - 33
4 u = 28
1 u = 28 ÷ 4 = 7
Number of cards that Zoe and Lucy had in the end
= 126 - 2 u
= 126 - 2 x 7
= 126 - 14
= 112
Answer(s): 112
