Min had some money. If she buys 9 chocolate bars, she will have $9 left. If she buys 13 chocolate bars, she will have $1 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.
9 C + 9 = 13 C + 1
13 C - 9 C = 9 - 1
4 C = 8
1 C = 8 ÷ 4 = 2
Cost of each chocolate bar = $2
(b)
Total amount that Min had
= 13 x 2 + 1
= 26 + 1
= $27
Answer(s): (a) $2; (b) $27