No Plagiarism!PNOS2AHGFv87KgCQvWKcposted on PENANA 題目:8964 copyright protection24PENANAJHQIUIrTs6 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 protection24PENANAVIOICQW55N 維尼
解題過程:8964 copyright protection24PENANAiaAMAqBAS4 維尼
一元一次:8964 copyright protection24PENANAuTm3FMvDaC 維尼
設定價為x,28Please respect copyright.PENANAuV7rIhEAsU
8964 copyright protection24PENANApZJInq9LVq 維尼
第一句話 ➙ 0.8x+420=成本8964 copyright protection24PENANAOCtGNncPJb 維尼
第二句話 ➙ 0.95x-300=成本8964 copyright protection24PENANAimRjvEmguE 維尼
➙ 0.8x+420=0.95x-30028Please respect copyright.PENANA3dU08xwnUn
8964 copyright protection24PENANAW1VtntSOWv 維尼
➙ 720 = 0.15x ➙ 4800 = x28Please respect copyright.PENANAXKwFWPXYKm
8964 copyright protection24PENANA1ev9Wm0bK7 維尼
➙ 0.8 * 4800 + 420 = 成本28Please respect copyright.PENANAt9B6vAt1Rd
8964 copyright protection24PENANAvEj4dxRIxN 維尼
➙ 成本 = 426028Please respect copyright.PENANAsYr82AjqjQ
8964 copyright protection24PENANAK1tKyy8pkm 維尼
28Please respect copyright.PENANAZtrhz2Cs3I
8964 copyright protection24PENANASRG4PgEfms 維尼
二元一次:8964 copyright protection24PENANA2QJIcW0itw 維尼
設定價為x,成本為y,8964 copyright protection24PENANACKR4sslRPt 維尼
第一句話 ➙ 0.8x = y - 4208964 copyright protection24PENANA8gkLSGjDag 維尼
第二句話 ➙ 0.95x = y + 3008964 copyright protection24PENANAOCqx8X1xKg 維尼
➙ 0.8x - y = -420 -------- A28Please respect copyright.PENANAYURW7LBuS8
8964 copyright protection24PENANANlhmlWRCKc 維尼
0.95x - y = 300 -------- B 28Please respect copyright.PENANA6b5WYKUB9B
8964 copyright protection24PENANAT7Begm01BX 維尼
➙0.15x = 720 ( B式 - A式 ) ➙ x = 480028Please respect copyright.PENANAQYJRyvmBJh
8964 copyright protection24PENANApwdnAqVV98 維尼
0.8 * 4800 - y = -420 ( x=4800帶入A式 ) ➙ y = 42608964 copyright protection24PENANACuZ06UR7QZ 維尼
➙ 定價為4800,成本為426028Please respect copyright.PENANAhzhUkHDicp
8964 copyright protection24PENANAKfjEC2Jq5K 維尼
28Please respect copyright.PENANAvKKeuDSvyc
8964 copyright protection24PENANA95UX2pABHH 維尼
得,此商品成本為4260元8964 copyright protection24PENANA1HEF81WmK5 維尼
28Please respect copyright.PENANACZAbCSBzr1
8964 copyright protection24PENANAWnDGnHj3z3 維尼
28Please respect copyright.PENANAjZwwnxnrdN
8964 copyright protection24PENANAuKTsnVdoeH 維尼
28Please respect copyright.PENANAGd1yq6Z8Za
8964 copyright protection24PENANAYBN0OcYvg6 維尼
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