方程式 help~help

2007-10-07 3:29 am
20-6c=11-30-3c
列式,一步不能少,help~help!!!

回答 (5)

2007-10-07 3:33 am
✔ 最佳答案
20-6c=11-30-3c
20-6c-11+30=-3c
20-11+30=-3c+6c
39=3c
c=39/3
c=13
參考: myself
2007-10-07 3:48 am
20-6c=11-30-3c
20-6c=-19-3c
20-6c+19=-3c
39-6c=-3c
39=-3c+6c
39=3c
c=39/3
c=13
2007-10-07 3:39 am
20-6c=11-30-3c
20-6c=19-3c
20=19+3c
1=3c
3c=1
c=1/3

2007-10-06 19:45:11 補充:
唔好意思,計錯左.正確答案:20-6c=11-30-3c20-6c=11-30-3c20-6c= -19-3c20= -19 3c39=3c13=cc=13 <-----------Answer
2007-10-07 3:34 am
20-6c=11-30-3c
6c-3c = 30-11+20
3C= 39
c=13

2007-12-06 01:07:43 補充:
可惜,答案答得太過長
2007-10-07 3:34 am
20-6c=11-30-3c
20+30-11=-3c+6c
39=3c
c=13


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