Risa, Yoko and Roshel had a total of 172 pens. Risa gave
13 of her pens away. Roshel gave away 3 times as many pens as Risa and Yoko gave away 53 pens. In the end, they had 103 pens left. How many pens did Yoko and Roshel have in total in the end?
| |
Risa |
Yoko |
Roshel |
Total |
| Before |
3 u |
? |
? |
172 |
| Change |
- 1 u |
- 53 |
- 3 u |
- 69 |
| After |
2 u |
? |
103 |
Number of pens that Roshel gave away
= 3 x 1 u
= 3 u
Number of pens given away
= 1 u + 53 + 3 u
= 4 u + 53
4 u + 53 = 172 - 103
4 u = 69 - 53
4 u = 16
1 u = 16 ÷ 4 = 4
Number of pens that Yoko and Roshel had in the end
= 103 - 2 u
= 103 - 2 x 4
= 103 - 8
= 95
Answer(s): 95
