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2007-03-21 5:56 am

(2/4x+1)-(1/4x-1)=3

回答 (8)

2007-03-21 6:01 am
✔ 最佳答案
 2   1
-------------=3
4x+1 4x-1
 2   1
-------+-----=3
4x+1 4x+1
 3
-------=3
4x+1
3(4x+1)=3
12x+3=3
12x=0
x=0

2007-03-20 22:04:11 補充:
如果用另一個方法, 2 1---- 1------1=34x   4x2 1-----=3 1-1 4x2 1-----=3 4x2 1=12x12x=3x=1/4
參考: 自己
2007-03-25 2:49 am
(2/4x+1)-(1/4x-1)=3
(2/4x+1-1)-(1/4x-1+1)=3
2/4x-1/4x=3
1/4xx4=3x4
x=12
2007-03-23 12:34 am
(2/4x+1)-(1/4x-1)=3
(2/4x+2)-(1/4x-1)=3
2/4x+2-1/4x+1=3
1/4x+3=3
x+12=12
x=0

or

(2/4x+1)-(1/4x-1)=3
(2/4x+2)-(1/4x-1)=3
2/4x+2-1/4x+1=3
1/4x=0
1/4x*4/1=0*4/1
x=0
參考: me
2007-03-21 6:09 am
(2/4x+1)-(1/4x-1)=3

  2         1     
----- +1- ----- +1=3
  4x        4x
  2       1
----- - ----- =3-2
  4x      4x
   2          1
-----X 4x - ----- X 4x =4x
  4x          4x

                    2-1= 4x
                      1= 4x
                     4x= 1

                         1
                      x=---
                         4

 
2007-03-21 6:04 am
(2/4x+1)-(1/4x-1) =3
1/2x+1/2-1/4x-1/4 =3
1/4x+1/4 =3
1/4x =3 1/4
0.25x =3.25
x =13

x=13       
2007-03-21 6:03 am
(2÷4×4+1)-(1÷4×4-1)
2007-03-21 6:02 am
2/4x+1 -1/4+1 =3

1/4x+1=3

1/4x=2

x=8

2007-03-20 22:04:34 補充:
對唔住 ,睇多左1/4x +2 =31/4x =1x=4
2007-03-21 6:01 am
(2/4x+1)-(1/4x-1)=3
2/4x+1-1/4+1=3
1/4x+2=3
1/4x=1
x=4

搞掂囉


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