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2007-05-19 10:44 pm
(c+3)*80%=20(請有方程式回答)

回答 (3)

2007-05-19 10:49 pm
✔ 最佳答案
(c+3)*80%=20
(c+3)*80/100=20
c+3 = 20*100/80
c+3 =25
c =22
2007-05-20 12:49 am
(c+3)×80%=20
   c+3=25
    c=22
2007-05-20 12:36 am
(c+3)*80%=20
c=20/80%-3
c=20*5/4-3
c=25-3
c=22
參考: myself


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