Vaidev bought some pastries. He bought some croissants with $5.40 more than half his money. He then bought some biscuits with $3.20 less than half of his remaining money. He then had $7.10 left. How much did he pay for the croissants?
| Croissants |
Remaining amount |
| 1 u + $5.40 |
1 u - $5.40 |
| |
Biscuits |
Left |
| |
1 p - $3.20 |
1 p + $3.20 |
| |
|
$7.10 |
Working backwards.
Amount that Vaidev had left = 1 p + 3.20
1 p + 3.20 = 7.10
1 p = 7.10 - 3.20 = 3.90
Remaining amount after he bought some croissants
= 2 p
= 2 x 3.90
= $7.80
Remaining amount after he bought some croissants = 1 u - 5.40
1 u - 5.40 = 7.80
1 u = 7.80 + 5.40
1 u = 13.20
Amount that Vaidev spent on some croissants
= 1 u + 5.40
= 13.20 + 5.40
= $18.60
Answer(s): $18.60
