4+8(9+6b)=28
回答 (6)
2007-09-30 3:41 am
✔ 最佳答案
4 + 8 ( 9 + 6b ) = 284 + 8 * 9 + 8 * 6b = 28
4 + 72 + 48b = 28
76 + 48b = 28
48b = 28 - 76
48b = -48
b = -48 / 48
b = -1
2007-09-29 19:43:57 補充：
另一做法︰4 + 8 ( 9 + 6b ) = 288 ( 9 + 6b ) = 28 - 48 ( 9 + 6b ) = 24 9 + 6b = 24 / 8 9 + 6b = 36b = 3 - 96b = -6b = -6 / 6b = -1
2007-09-30 5:45 am
4+8(9+6b)=28
4+72+48b=28
48b=28 - 4 - 72
48b= -48
b= -1
4+72+48b=28
48b=28 - 4 - 72
48b= -48
b= -1
2007-09-30 3:53 am
4+8(9+6b)=28
4+72+48b=28
76+48b=28
76+48b-76=28-76
48b=-48
b=-1
4+72+48b=28
76+48b=28
76+48b-76=28-76
48b=-48
b=-1
參考: by myself
2007-09-30 3:52 am
4+8(9+6b)=28
4+72+48b=28
48b=28 - 4 - 72
48b= -48
b= -1
4+72+48b=28
48b=28 - 4 - 72
48b= -48
b= -1
收錄日期: 2021-04-20 22:33:14
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https://hk.answers.yahoo.com/question/index?qid=20070929000051KK04226