Erika had some money. If she buys 6 chocolate bars, she will have $7 left. If she buys 8 chocolate bars, she will have $3 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.
6 C + 7 = 8 C + 3
8 C - 6 C = 7 - 3
2 C = 4
1 C = 4 ÷ 2 = 2
Cost of each chocolate bar = $2
(b)
Total amount that Erika had
= 8 x 2 + 3
= 16 + 3
= $19
Answer(s): (a) $2; (b) $19