急!!!!!1代數

2006-11-30 12:08 am
30-4A=2
點做?要列色!!!

回答 (9)

2006-11-30 12:16 am
✔ 最佳答案
30-4A+4A=2+4A
30=2+4A
30-2=2+4A-2
28=4A
28/4=4A/4
7=A
A=7
參考: myself
2006-11-30 12:13 am
30-4a=2
30-2=4a
4a=28
a=7
2006-11-30 12:13 am
30-4A=2
2+4A=30
4A=30-2
4A=28
A=28/4=7
參考: me
2006-11-30 12:13 am
30-4A=2
-4A=2-30
-4A=-28
4A=28
A=28/4
A=7
2006-11-30 12:13 am
30-4A=2
4A=30-2
4A=28
A=28/4
A=7
2006-11-30 12:12 am
30-4A=2

30-2-4A=2-2

28-4A=0

28-4A+4A=0+4A

28=4A

28/4=4A/4

7=A

ANS : 7
2006-11-30 12:12 am
30 - 4A = 2
30 = 2 + 4A
30 - 2 = 4A
28 = 4A
A = 28/4
A = 7
2006-11-30 12:12 am
30-4a=2
30-2=4a
28=4a
a=28/4
a=7
2006-11-30 12:12 am
-4A=2-30
-4A=-28
A=7

2006-11-29 16:13:36 補充:
努力一些,要重覆多做才有成果,勿太依賴他人。


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