Barbara, Tiffany and Lucy had a total of 334 pens. Barbara gave
13 of her pens away. Lucy gave away 5 times as many pens as Barbara and Tiffany gave away 87 pens. In the end, they had 157 pens left. How many pens did Tiffany and Lucy have in total in the end?
|
Barbara |
Tiffany |
Lucy |
Total |
Before |
3 u |
? |
? |
334 |
Change |
- 1 u |
- 87 |
- 5 u |
- 177 |
After |
2 u |
? |
157 |
Number of pens that Lucy gave away
= 5 x 1 u
= 5 u
Number of pens given away
= 1 u + 87 + 5 u
= 6 u + 87
6 u + 87 = 334 - 157
6 u = 177 - 87
6 u = 90
1 u = 90 ÷ 6 = 15
Number of pens that Tiffany and Lucy had in the end
= 157 - 2 u
= 157 - 2 x 15
= 157 - 30
= 127
Answer(s): 127