(+5)+(-7)=? (-7)-(-12)+? (-7
回答 (4)
2007-07-16 11:06 pm
✔ 最佳答案
(+5)+(-7)=? (-7)-(-12)+? (-7）如果设？ 为A，呢条式等于
5-7=-7A+12-7A
-2=-14A+12
-14=-14A
1=A
那个？ 就是1了
2007-07-19 3:55 am
(+5)+(-7)= -2
2007-07-16 11:16 pm
(+5)+(-7)=? (-7)-(-12)+? (-7)
-2 = -7?+12-7?
-14=-14?
1=?
2007-07-16 15:17:25 補充：
******
-2 = -7?+12-7?
-14=-14?
1=?
2007-07-16 15:17:25 補充：
******
2007-07-16 10:59 pm
(+5)+(-7)=? (-7)-(-12)+? (-7)
-2 = -7?+12-7?
-14=-14?
1=?
-2 = -7?+12-7?
-14=-14?
1=?
收錄日期: 2021-04-23 20:05:06
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070716000051KK02569