3 brothers, Joelle, Julie and Betty, paid a total of $171 for a present. Joelle paid
12 of what the others paid. Julie paid
15 of what the others paid. How much did Betty pay?
| Joelle |
Betty |
Julie |
Total |
| 1x2 |
2x2 |
3x2 |
| 5x1 |
1x1 |
6x1 |
| 2 u |
3 u |
1 u |
6 u |
Total cost of the present = 6 u
6 u = 171
1 u = 171 ÷ 6 = 28.50
Amount that Betty paid
= 6 u - 2 u - 1 u
= 3 u
= 3 x 28.50
= $85.50
Answer: $85.50
