Gillian, Xuan and Joelle had a total of 315 cards. Gillian gave
35 of her cards away. Joelle gave away 2 times as many cards as Gillian and Xuan gave away 35 cards. In the end, they had 172 cards left. How many cards did Xuan and Joelle have in total in the end?
|
Gillian |
Xuan |
Joelle |
Total |
Before |
5 u |
? |
? |
315 |
Change |
- 3 u |
- 35 |
- 6 u |
- 143 |
After |
2 u |
? |
172 |
Number of cards that Joelle gave away
= 2 x 3 u
= 6 u
Number of cards given away
= 3 u + 35 + 6 u
= 9 u + 35
9 u + 35 = 315 - 172
9 u = 143 - 35
9 u = 108
1 u = 108 ÷ 9 = 12
Number of cards that Xuan and Joelle had in the end
= 172 - 2 u
= 172 - 2 x 12
= 172 - 24
= 148
Answer(s): 148