Riordan bought some pastries. He bought some wafers with $8.60 more than half his money. He then bought some scones with $1.30 less than half of his remaining money. He then had $6.40 left. How much did he pay for the wafers?
| Wafers |
Remaining amount |
| 1 u + $8.60 |
1 u - $8.60 |
| |
Scones |
Left |
| |
1 p - $1.30 |
1 p + $1.30 |
| |
|
$6.40 |
Working backwards.
Amount that Riordan had left = 1 p + 1.30
1 p + 1.30 = 6.40
1 p = 6.40 - 1.30 = 5.10
Remaining amount after he bought some wafers
= 2 p
= 2 x 5.10
= $10.20
Remaining amount after he bought some wafers = 1 u - 8.60
1 u - 8.60 = 10.20
1 u = 10.20 + 8.60
1 u = 18.80
Amount that Riordan spent on some wafers
= 1 u + 8.60
= 18.80 + 8.60
= $27.40
Answer(s): $27.40
