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No Plagiarism!4MgwcZssWOxioDUXyE0hposted on PENANA 題目:8964 copyright protection22PENANAVz1v2eQbav 維尼
已知某商品以定價八折賣出將賠本420元;如果以定價的九五折賣出可賺300元,求此商品成本為_______元。8964 copyright protection22PENANADcu24JhZlV 維尼
解題過程:8964 copyright protection22PENANAY9gigFbIia 維尼
一元一次:8964 copyright protection22PENANAeYl9V3hPhY 維尼
設定價為x,26Please respect copyright.PENANAEPfeB0V3FQ
8964 copyright protection22PENANAhnEmPezBu5 維尼
第一句話 ➙ 0.8x+420=成本8964 copyright protection22PENANAG7eJfyzjd5 維尼
第二句話 ➙ 0.95x-300=成本8964 copyright protection22PENANAGUTu9iKiKI 維尼
➙ 0.8x+420=0.95x-30026Please respect copyright.PENANAHleSaRId7p
8964 copyright protection22PENANAz162WtJqDM 維尼
➙ 720 = 0.15x ➙ 4800 = x26Please respect copyright.PENANADYa01nc2Zr
8964 copyright protection22PENANARnhosRN1Bv 維尼
➙ 0.8 * 4800 + 420 = 成本26Please respect copyright.PENANANiQwL8VROR
8964 copyright protection22PENANAlFDpaf6nEK 維尼
➙ 成本 = 426026Please respect copyright.PENANACSA5wEuhei
8964 copyright protection22PENANAznItfa187j 維尼
26Please respect copyright.PENANADsQU3aTddN
8964 copyright protection22PENANA0SQBfJzM0C 維尼
二元一次:8964 copyright protection22PENANAfp4GGcdP02 維尼
設定價為x,成本為y,8964 copyright protection22PENANAmi26L6HUgb 維尼
第一句話 ➙ 0.8x = y - 4208964 copyright protection22PENANAUTLEaxpO6U 維尼
第二句話 ➙ 0.95x = y + 3008964 copyright protection22PENANAj0C0j9NlIV 維尼
➙ 0.8x - y = -420 -------- A26Please respect copyright.PENANAyEpUxWnC98
8964 copyright protection22PENANAF05PVnEF8V 維尼
0.95x - y = 300 -------- B 26Please respect copyright.PENANAZBWnfDBwpM
8964 copyright protection22PENANALtg4WsoBLz 維尼
➙0.15x = 720 ( B式 - A式 ) ➙ x = 480026Please respect copyright.PENANAvEApzKXvKQ
8964 copyright protection22PENANAujHA4kI7SD 維尼
0.8 * 4800 - y = -420 ( x=4800帶入A式 ) ➙ y = 42608964 copyright protection22PENANA67ZNIawE7t 維尼
➙ 定價為4800,成本為426026Please respect copyright.PENANAAuFzJTJDTQ
8964 copyright protection22PENANAi27UUWST7w 維尼
26Please respect copyright.PENANAtGmm9MnvQQ
8964 copyright protection22PENANAAAKGIT0G8V 維尼
得,此商品成本為4260元8964 copyright protection22PENANABuTHY05giM 維尼
26Please respect copyright.PENANA2klzWWHzNt
8964 copyright protection22PENANAI7dynPqzRQ 維尼
26Please respect copyright.PENANA7YA1eUTQ8u
8964 copyright protection22PENANAbRis4reoJW 維尼
26Please respect copyright.PENANACi7Gjgew62
8964 copyright protection22PENANAcUR3zuZT6k 維尼
18.216.131.153
ns18.216.131.153da2