Yen had some money. If she buys 5 chocolate bars, she will have $8 left. If she buys 7 chocolate bars, she will have $2 left.
- How much does each chocolate bar cost?
- How much money does she have?
(a)
Let 1 C be the price of 1 chocolate bar.
5 C + 8 = 7 C + 2
7 C - 5 C = 8 - 2
2 C = 6
1 C = 6 ÷ 2 = 3
Cost of each chocolate bar = $3
(b)
Total amount that Yen had
= 7 x 3 + 2
= 21 + 2
= $23
Answer(s): (a) $3; (b) $23