Abi had some money. If she buys 13 sweets, she will have $9 left. If she buys 15 sweets, she will have $3 left.
- How much does each sweet cost?
- How much money does she have?
(a)
Let 1 S be the price of 1 sweet.
13 S + 9 = 15 S + 3
15 S - 13 S = 9 - 3
2 S = 6
1 S = 6 ÷ 2 = 3
Cost of each sweet = $3
(b)
Total amount that Abi had
= 15 x 3 + 3
= 45 + 3
= $48
Answer(s): (a) $3; (b) $48