Min had some money. If she buys 6 sweets, she will have $7 left. If she buys 9 sweets, she will have $1 left.
- How much does each sweet cost?
- How much money does she have?
(a)
Let 1 S be the price of 1 sweet.
6 S + 7 = 9 S + 1
9 S - 6 S = 7 - 1
3 S = 6
1 S = 6 ÷ 3 = 2
Cost of each sweet = $2
(b)
Total amount that Min had
= 9 x 2 + 1
= 18 + 1
= $19
Answer(s): (a) $2; (b) $19