方程式一條

👨🏻‍🏫 學術台數學

用戶130382

2008-03-26 3:21 am

(k x 20%) + (k x 80% x 37.5%) = 9

步驟 thx

回答 (3)

TSO9

2008-03-26 3:23 am

✔ 最佳答案

(k x 20%) + (k x 80% x 37.5%) = 9
0.2k+0.3k=9
0.5k=9
k=18

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JULIE

2008-03-26 10:01 pm

(kx20%)+(kx80%x37.5%)=9
20/100k+3/10k=9
(20/100+30/100)k=9
50/100k=9
k=9x100/50
k=18

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Calvin

2008-03-26 4:01 am

(kx20%) (kx80%x37.5%)=9
(1/5)k [k(4/5)(37.5/100)]=9
(1/5)k (3/10)k=9
(1/2)k=9
k=9(2/1)
k=18

備注: / = 分線

參考: me

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