2(x-9)-7(2x+3)=4(x-1)-15(x+1)
7(2x-3)-3(4x+1)=4-10(2-x)
6(x-2)+3(x+8)=4(x+3)
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2006-11-02 4:20 am
回答 (3)
2006-11-02 4:25 am
✔ 最佳答案
2(x-9)-7(2x+3)=4(x-1 )-15(x+1)2x – 18 – 14x – 21 = 4x – 4 – 15x – 15
-12x – 39 = -11x – 19
x = -20
7(2x-3)-3(4x+1)=4-10 (2-x)
14x – 21 – 12x – 3 = 4 – 20 + 10x
2x – 24 = 10x – 16
8x = -8
x = -1
6(x-2)+3(x+8)=4(x+3)
6x – 12 + 3x + 24 = 4x + 12
9x + 12 = 4x + 12
5x = 0
x = 0
2006-11-02 4:32 am
2x-18-14x+21=4x-4-15x-15
13x=-22.
x=22over13
14x-21-12x-3=4-20-10x
12x=17
x=17over12
6x-12+3x+24=4x+12
5x=0
x=0
（因爲我台電腦不可以打分數）
如果是功課的應該自己做
13x=-22.
x=22over13
14x-21-12x-3=4-20-10x
12x=17
x=17over12
6x-12+3x+24=4x+12
5x=0
x=0
（因爲我台電腦不可以打分數）
如果是功課的應該自己做
2006-11-02 4:26 am
2(x-9)-7(2x+3)=4(x-1)-15(x+1)
2x-18-14x-21=4x-4-15x-15
-12x-29=-11x-19
-x=10
x=-10
7(2x-3)-3(4x+1)=4-10(2-x)
14x-21-12x-3=4-20+10x
2x-24=10x-16
-8=8x
x=-1
6(x-2)+3(x+8)=4(x+3)
6x-12+3x+24=4x+12
9x+12=4x+12
9x=4x
x=0
2006-11-01 20:27:21 補充：
The first one2(x-9)-7(2x+3)=4(x-1)-15(x+1)2x-18-14x-21=4x-4-15x-15-12x-39=-11x-19-x=20x=-20
2x-18-14x-21=4x-4-15x-15
-12x-29=-11x-19
-x=10
x=-10
7(2x-3)-3(4x+1)=4-10(2-x)
14x-21-12x-3=4-20+10x
2x-24=10x-16
-8=8x
x=-1
6(x-2)+3(x+8)=4(x+3)
6x-12+3x+24=4x+12
9x+12=4x+12
9x=4x
x=0
2006-11-01 20:27:21 補充：
The first one2(x-9)-7(2x+3)=4(x-1)-15(x+1)2x-18-14x-21=4x-4-15x-15-12x-39=-11x-19-x=20x=-20
收錄日期: 2021-04-13 16:19:03
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061101000051KK03760