3 brothers, Tammy, Mary and Kathy, paid a total of $63 for a present. Tammy paid
14 of what the others paid. Mary paid
18 of what the others paid. How much did Kathy pay?
| Tammy |
Kathy |
Mary |
Total |
| 1x9 |
4x9 |
5x9 |
| 8x5 |
1x5 |
9x5 |
| 9 u |
31 u |
5 u |
45 u |
Total cost of the present = 45 u
45 u = 63
1 u = 63 ÷ 45 = 1.40
Amount that Kathy paid
= 45 u - 9 u - 5 u
= 31 u
= 31 x 1.40
= $43.40
Answer: $43.40
