Fiona had some money. If she buys 7 sweets, she will have $6 left. If she buys 9 sweets, she will have $2 left.
- How much does each sweet cost?
- How much money does she have?
(a)
Let 1 S be the price of 1 sweet.
7 S + 6 = 9 S + 2
9 S - 7 S = 6 - 2
2 S = 4
1 S = 4 ÷ 2 = 2
Cost of each sweet = $2
(b)
Total amount that Fiona had
= 9 x 2 + 2
= 18 + 2
= $20
Answer(s): (a) $2; (b) $20