Question

One day in Costbuilder I bought 4 cans of Popsicle and 7 Gandy bars for £8.16. On another day I

paid £4.77 for 3 cans of Popsicle and 3 Gandy bars.
Given that the price of the items had not changed, what did a Gandy bar cost?

Answer 1

Gandy bar cost £0.60

Explanation:

let p represent the cost of a popsicle and g the cost of a Gandy bar.

use simultaneous equations to solve.

4p + 7g = 8.16 → (1)

3p + 3g = 4.77 → (2)

multiplying (1) by 3 and (2) by - 4 and adding will eliminate p

12p + 21g = 24.48 → (3)

- 12p - 12g = - 19.08 → (4)

add (3) and (4) term by term to eliminate p

0 + 9g = 5.4

9g = 5.4 ( divide both sides by 9 )

g = 0.6

A Gandy bar cost £0.60