Barbara buys

3 boxes of eggs costing £1.20 each

1 jar of mayonnaise costing £1.80

2 loaves of bread

She pays with a £10 note and gets £1.60 change.

Barbara works out the cost of 1 loaf of bread as £1.40

Is she correct?

You must show your working.

Actually, a loaf of bread costs 1.5. Barbara was wrong but only by 10 pence

Step-by-step explanation:

1 box of eggs = 1.2

3 boxes of eggs = 3*1.2=3.6

1 jar of mayonnaise = 1.8

2 loves of bread=2x

Total price of her purchases = 10-1.6=8.4

Setting up the equation:

3.6+1.8+2x=8.4

Solving for x

2x=8.4-3.6-1.8

2x=3

x=3/2=1.5