Marion had some money. If she buys 13 sweets, she will have $7 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 + 7 = 15 S + 3
15 S - 13 S = 7 - 3
2 S = 4
1 S = 4 ÷ 2 = 2
Cost of each sweet = $2
(b)
Total amount that Marion had
= 15 x 2 + 3
= 30 + 3
= $33
Answer(s): (a) $2; (b) $33