問1問 代數既問題=] 20點牙!!

(h+9) / 9 = 5/6 - 1/2

(h+9) = 45/6 - 9/2 兩方X9去分母

(h+9) = 45/6 - 27/6 通分

h + 9 = 18/6

h + 9 = 3

h = 3-9

h = - 6



2009-10-27 20:06:24 補充：
解二 :

(h+9) / 9 = 5/6 - 1/2

(h+9) / 9 = 5/6 - 3/6 先通分

(h+9) / 9 = 2/6

(h+9) / 9 = 1/3

3(h+9) = 1*9 分子分母交差相乘

3h + 27 = 9

3h = - 18

h = - 18/3

h = - 6

1/9(h+9) =5/6-1/2
1/9(h+9) =5/6-3/6←先計算(通分)
1/9(h+9) =2/6←(約簡)1/3
(h+9) =1/3乘9/1←跳步(1/3除1/9)←再約簡約成3
h = 3-9
h = -6

1/9(h+9) =5/6-1/2
1/9(h+9) =5/6-3/6←先計算(通分)
1/9(h+9) =2/6←(約簡)1/3
(h+9) =1/3乘9/1←跳步(1/3除1/9)←再約簡約成3
h = 3-9
h = -6

*選我做最佳啦~

2009-10-27 20:08:03 補充：
果d &larr 你唔好睇

2009-10-27 21:13:38 補充：
003照抄ge !!!!!