The whole word problem is:
Kalinda buys x packs of currant buns and y boxes of iced buns.
There are 6 currant buns in a pack of currant buns.
There are 8 iced buns in a box of iced buns.
Kalinda buys a total of T buns.
Write down a formula for T in terms of x and y.
T = 6x + 8y
