Question

You bought 5 chocolate bars and 8 blow pops for $23.25. Your sister bought 2 chocolate bars and 13 blow pops for $21.55. How much did each chocolate bar cost? Each chocolate bar cost $

Answer 1

• $2.65

Explanation:

Let chocolate bar cost be c and blow pop cost be b

Then we have equations:

• 5c + 8b = 23.25
• 2c + 13b = 21.55

Multiply the first equation by 13 and the second one by 8 and subtract:

• 13(5c + 8b) - 8(2c + 13b) = 13(23.25) - 8(21.55)
• 65c - 16c = 129.85
• 49c = 129.85
• c = 129.85/49
• c = 2.65

Chocolate bar costs $2.65