30-a=30
回答 (12)
2007-07-03 10:56 pm
✔ 最佳答案
30-a=3030=30+a
30-30=30+a-30
0=a
a=0
2007-07-04 6:27 am
2007-07-04 2:02 am
30 - a = 30
30 - 30 = a
a = 0
30 - 30 = a
a = 0
2007-07-04 1:25 am
30-a=30 是因為a=0。
2007-07-04 1:00 am
30-a=30
30=30+a
30-30=a
a=0
30=30+a
30-30=a
a=0
2007-07-03 11:51 pm
30-30=a
a=0
a=0
2007-07-03 11:12 pm
30-a=30
a=0
a=0
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070703000051KK01906