第一條:
3分之a+4分之a 乘以4=42
方程式唔識做!!
2007-03-23 12:20 am
回答 (8)
2007-03-23 4:20 am
✔ 最佳答案
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問題：解方程（要步驟＋答案）
3分之a+4分之a 乘以4=42
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回答：
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《完》
2007-03-23 19:50:40 補充：
點解會有人負評！？我……沒有啊！！！
參考: myself.
2007-03-23 2:58 am
我唸應該係咁:
( a/3 + a/4 ) x 4 = 42
(4a / 12 + 3a / 12 ) x 4 = 42
(7a / 12 ) x 4 = 42
28a = 42 x 12
a = 18
( a/3 + a/4 ) x 4 = 42
(4a / 12 + 3a / 12 ) x 4 = 42
(7a / 12 ) x 4 = 42
28a = 42 x 12
a = 18
2007-03-23 1:13 am
a a
─ + ─ x 4 =42
3 4
4a 3a
─ + ─ x 4=42 (先通分母)
12 12
7a
─ x 4=42 (約數)
12
7a
─ x 1 =42
3
7a = 42 x 3
7a =126
a =18
─ + ─ x 4 =42
3 4
4a 3a
─ + ─ x 4=42 (先通分母)
12 12
7a
─ x 4=42 (約數)
12
7a
─ x 1 =42
3
7a = 42 x 3
7a =126
a =18
參考: me
2007-03-23 12:33 am
如果係
(a/3 + a/4)*4 = 42
咁
(7a/12)*4 = 42
7a = 126
a = 18
如果係
a/3 + (a/4)*4 = 42
咁
a/3 + a = 42
4a/3 = 42
4a = 126
a = 31.5
(a/3 + a/4)*4 = 42
咁
(7a/12)*4 = 42
7a = 126
a = 18
如果係
a/3 + (a/4)*4 = 42
咁
a/3 + a = 42
4a/3 = 42
4a = 126
a = 31.5
參考: myself
2007-03-23 12:33 am
(a/3)+(a/4)*4=42
(a/3)+(a/4)=42*4
(4a/12)+(3a/12)=168
7a/12=168
7a=168*12
7a=2016
a=2016/7
a=288
2007-03-22 16:34:38 補充：
(a/3) (a/4)*4=42(a/3) (a/4)=42/4(4a/12) (3a/12)=10.57a/12=10.57a=10.5*127a=126a=126/7a=18This is correct~~~
(a/3)+(a/4)=42*4
(4a/12)+(3a/12)=168
7a/12=168
7a=168*12
7a=2016
a=2016/7
a=288
2007-03-22 16:34:38 補充：
(a/3) (a/4)*4=42(a/3) (a/4)=42/4(4a/12) (3a/12)=10.57a/12=10.57a=10.5*127a=126a=126/7a=18This is correct~~~
參考: Myself
2007-03-23 12:28 am
( a/3 + a/4 ) x 4 = 42
(4a / 12 + 3a / 12 ) x 4 = 42
(7a / 12 ) x 4 = 42
28a = 42 x 12
a = 18
(4a / 12 + 3a / 12 ) x 4 = 42
(7a / 12 ) x 4 = 42
28a = 42 x 12
a = 18
2007-03-23 12:26 am
the answer is, a= 98
2007-03-22 16:32:47 補充：
step (a/3)+(a/4)4=42 (a/3)+(a/4)=10.5 (7a/12)=10.5 a=6.125so the first is wrong
2007-03-22 16:32:47 補充：
step (a/3)+(a/4)4=42 (a/3)+(a/4)=10.5 (7a/12)=10.5 a=6.125so the first is wrong
收錄日期: 2021-04-12 21:36:49
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070322000051KK01966