唔該教教我啦....
1. 2/3(3y-6)=y
2. 2-3x/5=1/2
3.1/2y+2=-1/4
4. 3/2t+3=5/3t-1/3
代數式的運算
2007-08-23 1:25 am
回答 (5)
2007-08-23 1:38 am
✔ 最佳答案
1. 2/3(3y-6)=y2(3y-6)=3y
6y-3y=12
3y=12
y=4
2. 2-3x/5=1/2
10-3x=5/2
3x=15/2
x=5/2
3.1/2y+2=-1/4
2y+8= -1
2y=-7
y= -7/2
4. 3/2t+3=5/3t-1/3
3/2t-5/3t= -1/3-3
-1/6t=-10/3
t=20
參考: me
2007-09-07 6:19 am
NO.1個條...好難明.+_+
2007-08-23 8:30 am
4
2.5
4/18
1/20
2.5
4/18
1/20
2007-08-23 1:41 am
1. (2/3)(3y-6)=y
3y-6=(3/2)y
3y-(3/2)y=6
(3/2)y=6
y=4
2. 2-3x/5=1/2
2-(1/2)=3x/5
3/2=3x/5
15/2=3x
x=5/2
3.(1/2)y=-(1/4)-2
(1/2)y=-9/4
y=-9/2
4.(3/2)t+3=(5/3)t-(1/3)
(3/2)t-(5/3)t=-(1/3)-3
-(1/6)t=-(10/3)
t=20
3y-6=(3/2)y
3y-(3/2)y=6
(3/2)y=6
y=4
2. 2-3x/5=1/2
2-(1/2)=3x/5
3/2=3x/5
15/2=3x
x=5/2
3.(1/2)y=-(1/4)-2
(1/2)y=-9/4
y=-9/2
4.(3/2)t+3=(5/3)t-(1/3)
(3/2)t-(5/3)t=-(1/3)-3
-(1/6)t=-(10/3)
t=20
參考: myself
2007-08-23 1:34 am
1 y=4
2 X=2.5
3 y=4/18
4 t =1/20
2 X=2.5
3 y=4/18
4 t =1/20
收錄日期: 2021-04-13 14:39:38
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https://hk.answers.yahoo.com/question/index?qid=20070822000051KK04042