Nicole, Xandra and Tiffany had a total of 380 pens. Nicole gave
25 of her pens away. Tiffany gave away 4 times as many pens as Nicole and Xandra gave away 93 pens. In the end, they had 107 pens left. How many pens did Xandra and Tiffany have in total in the end?
|
Nicole |
Xandra |
Tiffany |
Total |
Before |
5 u |
? |
? |
380 |
Change |
- 2 u |
- 93 |
- 8 u |
- 273 |
After |
3 u |
? |
107 |
Number of pens that Tiffany gave away
= 4 x 2 u
= 8 u
Number of pens given away
= 2 u + 93 + 8 u
= 10 u + 93
10 u + 93 = 380 - 107
10 u = 273 - 93
10 u = 180
1 u = 180 ÷ 10 = 18
Number of pens that Xandra and Tiffany had in the end
= 107 - 3 u
= 107 - 3 x 18
= 107 - 54
= 53
Answer(s): 53