Irene had some money. If she buys 8 sweets, she will have $5 left. If she buys 10 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.
8 S + 5 = 10 S + 1
10 S - 8 S = 5 - 1
2 S = 4
1 S = 4 ÷ 2 = 2
Cost of each sweet = $2
(b)
Total amount that Irene had
= 10 x 2 + 1
= 20 + 1
= $21
Answer(s): (a) $2; (b) $21