為什麼不是2y=x呢? - 經濟

By Irma
at 2017-04-29T20:36
at 2017-04-29T20:36
Table of Contents
http://i.imgur.com/UuAmgeF.jpg
請問...
一張cd要200元,設cd為x
清一包垃圾要100元,設垃圾為y
要清2包垃圾才能換一張cd
那應該是2y=x吧?
為什麼答案是寫y=2x呢?
感恩~
--
請問...
一張cd要200元,設cd為x
清一包垃圾要100元,設垃圾為y
要清2包垃圾才能換一張cd
那應該是2y=x吧?
為什麼答案是寫y=2x呢?
感恩~
--
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經濟
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