4 t-shirts and a hat costs £29.00 3 t-shirts and a hat costs £23.00.
How much does a t-shirt cost?
How much does a hat cost?

29-3=6
1 t-shirt =6
6 x 3= 18
23-18= 5

answer =5

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.