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1.小華要買入糖果袋a和b共150kg.在糖果a中,芒果味糖果佔總重量的82%,
而在糖果袋b中,芒果味的則佔總重量的42%.如果他想把全部所買的糖果混合,
還使芒果味糖果佔總重量的50%,求他須買入每種糖果的重量.
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2007-12-04 6:14 am
回答 (3)
2007-12-04 6:38 am
✔ 最佳答案
設 y 是糖果袋 a 的重量y * 82% + (150 - y) * 42% = 150 * 0.5
y * 82% + (150 - y) * 42% = 75
y * 82% + (150 * 42% - y * 42%) = 75
y * 40% + 63 = 75
0.4 y = 12
y = 30
a 袋的芒果味糖果的重量是 = 30 * 0.82 = 24.6 kg
b 袋的芒果味糖果的重量是 = (150 - 30) * 0.42 = 50.4 kg
2007-12-04 6:45 am
150kg乘82%=123kg
123乘142%(1+42%)=174.66
174.66+150=324.66
324.66除2=162.33
162.33減150=12.33
答案好似怪怪地..唔知岩唔岩
設 y 是糖果袋 a 的重量
y * 82% + (150 - y) * 42% = 150 * 0.5
y * 82% + (150 - y) * 42% = 75
y * 82% + (150 * 42% - y * 42%) = 75
y * 40% + 63 = 75
0.4 y = 12
y = 30
a 袋的芒果味糖果的重量是 = 30 * 0.82 = 24.6 kg
b 袋的芒果味糖果的重量是 = (150 - 30) * 0.42 = 50.4 kg
123乘142%(1+42%)=174.66
174.66+150=324.66
324.66除2=162.33
162.33減150=12.33
答案好似怪怪地..唔知岩唔岩
設 y 是糖果袋 a 的重量
y * 82% + (150 - y) * 42% = 150 * 0.5
y * 82% + (150 - y) * 42% = 75
y * 82% + (150 * 42% - y * 42%) = 75
y * 40% + 63 = 75
0.4 y = 12
y = 30
a 袋的芒果味糖果的重量是 = 30 * 0.82 = 24.6 kg
b 袋的芒果味糖果的重量是 = (150 - 30) * 0.42 = 50.4 kg
參考: MMMMMMMMMMMMMMMMMMMMMEEEEEEEEEEEEEEEEEEEEEEEEEE
2007-12-04 6:23 am
150kg乘82%=123kg
123乘142%(1+42%)=174.66
174.66+150=324.66
324.66除2=162.33
162.33減150=12.33
答案好似怪怪地..唔知岩唔岩
123乘142%(1+42%)=174.66
174.66+150=324.66
324.66除2=162.33
162.33減150=12.33
答案好似怪怪地..唔知岩唔岩
收錄日期: 2021-04-13 14:38:06
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071203000051KK04219