Fanny had some money. If she buys 11 chocolate bars, she will have $9 left. If she buys 15 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.
11 C + 9 = 15 C + 1
15 C - 11 C = 9 - 1
4 C = 8
1 C = 8 ÷ 4 = 2
Cost of each chocolate bar = $2
(b)
Total amount that Fanny had
= 15 x 2 + 1
= 30 + 1
= $31
Answer(s): (a) $2; (b) $31