There are 3 types of concert tickets:$400,$200 and $100 .the number of $200 tickets sold is 4 times that of $400tickets.the number of $100 tickets sold is 380 more than that of $200 tickets .If the total income from the tickets is $86000,find the number of$400 tickets sold.
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MATH F.1
2008-06-02 12:44 am
回答 (2)
2008-06-02 2:11 am
✔ 最佳答案
首 先 你 要 搞 清 楚 佢 要 問 咩 ..佢 要 你 搵 出 $ 400 既 飛 賣 左 幾 多 張 ..
咁 你 就 要 設 左 個 $ 400 既 飛 賣 左 x 張 ..
設 左 之 後 就 要 宗 個 方 程 出 黎 ..
佢 話 $ 200 既 飛 係 $ 400 既 飛 既 4 倍 .. 姐 係 4x 張 ..
又 話 $ 100 既 飛 係 $ 200 既 飛 多 380 張 .. 姐 係 (4x + 380) 張 ..
咁 我 地 知 道 左 D 飛 既 數 量 ..
就 要 乘 埋 個 價 錢 ..
咁 條 式 就 會 變 成 咁 : 400(x) + 200(4x) + 100(4x+380) = 86000
咁 就 可 以 慢 慢 計 喇 !
Let x be the number that $ 400 tickets sold.
So the $ 200 tickets sold 4x tickets. And $ 100 tickets sold (4x + 380) tickets.
400(x) + 200(4x) + 100(4x+380) = 86000
400x + 800x + 400x + 38000 = 86000
1600x + 38000 = 86000
1600x = 86000 - 38000
1600x = 48000
x = 48000/1600
x = 30
2008-06-02 12:56 am
Let x be the number of$400 tickets sold
so the number of $200 tickets sold is 4x
the number of $100 tickets sold is 4x + 380
the total income from the tickets :
400x + 200(4x) + 100(4x+380) = 86000
1600x + 38000 = 86000
1600x = 48000
x = 30
so the number of $200 tickets sold is 4x
the number of $100 tickets sold is 4x + 380
the total income from the tickets :
400x + 200(4x) + 100(4x+380) = 86000
1600x + 38000 = 86000
1600x = 48000
x = 30
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