急急急!!!數學一問??
回答 (4)
2008-01-04 3:25 am
✔ 最佳答案
設x是去年西瓜產量x(1+25%)=30
x=24
30-24=6
so比去年增產多6吨
2008-01-04 3:26 am
30x(1-25%)=22.5吨
2008-01-04 3:24 am
7.5吨
Hope it is the best answer.
Hope it is the best answer.
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https://hk.answers.yahoo.com/question/index?qid=20080103000051KK02807