3 sisters, Xuan, Rachel and Lucy, paid a total of $138 for a souvenir. Xuan paid
13 of what the others paid. Rachel paid
15 of what the others paid. How much did Lucy pay?
| Xuan |
Lucy |
Rachel |
Total |
| 1x3 |
3x3 |
4x3 |
| 5x2 |
1x2 |
6x2 |
| 3 u |
7 u |
2 u |
12 u |
Total cost of the souvenir = 12 u
12 u = 138
1 u = 138 ÷ 12 = 11.50
Amount that Lucy paid
= 12 u - 3 u - 2 u
= 7 u
= 7 x 11.50
= $80.50
Answer: $80.50
