請把以下問題列式咁寫個答案出黎
1)In a computer shop, the total income of MP3 of Brand J and Brand S is $18880. If the number of Brand S has sold was 8 and the selling prices of each MP3 of Brand J and Brand S were $1280 and $1560 respectively. How many MP3 of Brand J did the Brand J did the shop sell?
(a) use x to represent
(i) the total income of MP3 of Brand J
(ii) the total income of MP3 of Brand S
(b) use x to construct an equation and find the value of x
Maths一問
2007-08-23 6:16 am
回答 (1)
2007-08-23 6:41 am
✔ 最佳答案
I think in your question, x represents the number of Brand J that sold.(a)(i) 1280x
(ii) 18880-1280x
(b) 18880-1280x = 8*1560
1280x = 18880 - 12480
1280x = 6400
x = 5
參考: me
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