解下列各方程。

2006-11-24 1:46 am
11) 3份之k-1=2
14) 17份之44-p=0
17) 0.2x+7.2=4.8
20) 3份之1+4份之x=12份之1
23) 5份之4-3p=-2
265+2份之z-4=4

回答 (2)

2006-11-24 2:24 am
✔ 最佳答案
11.
(k - 1)/3 = 2
k - 1 = 6
k = 7

14.
(44 - p) / 17 = 0
44 - p = 0
44 = p
p = 44

17.
0.2x + 7.2 = 4.8
0.2x = 4.8 - 7.2
0.2x = -2.4
x = -12

20.
1/3 + x/4 = 1/12
4/12 + (3x)/12 = 1/12
(4 + 3x)/12 = 1/12
4 + 3x = 1
3x = 1 - 4
3x = -3
x = -1

23.
(4 - 3p)/5 = -2
4 - 3p = -10
4 + 10 = 3p
14 = 3p
3p = 14
p = 14/3

26.
5 + (z - 4)/2 = 4
(z - 4)/2 = 4 - 5
(z - 4)/2 = -1
z - 4 = -2
z = 4 - 2
z = 2
參考: myself
2006-11-24 1:55 am
11.7
14.44
17.12
20.0
23.-2
呢條唔知講咩  265+2份之z-4=4


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