- #1

orangesun

- 16

- 0

## Homework Statement

p = $1.60 each, p = 40c each and a = 70c each.

At the shop she gave a $10 note and received a dozen pieces of fruit and $1 change.

how many A does she have

## Homework Equations

I have a strange feeling I might need to use higher level maths to solve this (Gaussian) but theyre still at a young level.

## The Attempt at a Solution

I set up the equations at least

1.60p + 0.40b + 0.7a = 9 (times 10 to get rid of annoying decimal)

p + b + a = 12

16p + 4b + 7a = 90

I then eliminated to get:

12b + 9a = 102

12p + 3a = 42

9p + 3b = 6

I don't know where to go from here, I hope you can help me! Thanks