2006-9-30 03:40 PM
natey
F.1 Maths 方程式(文字題)
In a supermarket, the price of an apple is $2.5, and orange is $3. Alan got $2 left after
buying some apples. However, he would need $2 more if he wanted to buy the same
number of oranges. Find the number of apples he bought
[[i] 本帖最後由 natey 於 2006-9-30 03:43 PM 編輯 [/i]]
2006-9-30 06:23 PM
幽魂『Phantom』
Let x be the number of apples bought
so, Alan has $ (2.5x+2)
For orange,
3x=2.5x+2+2 <--3x 係買橙要既錢
x=8