伐數不等式3(請盡快回答)

2015-03-25 3:29 am
解下列各不等式,並在數線上表示不等式的解,要步驟+答案
1.3x-2≥7
2.1+3x≤10
3.-4x-1≥7
4.4+x≥2x+3
5.x+2>4+3x
6.10-2x>x+1
7.5-3≤1-x
8.5x+8>3
9.2-5x<7
10.4-2x≤-2
11.x-7<3+x5

回答 (2)

2015-03-25 7:56 am
✔ 最佳答案
1.
3x - 2 ≥ 7
3x ≥ 9
x ≥ 3


2.
1 + 3x ≤ 10
3x ≤ 9
x ≤ 3


3.
-4x - 1 ≥ 7
-4x ≥ 8
4x ≤ -8
x ≤ -2


4.
4 + x ≥ 2x + 3
4 + x -4 - 2x ≥ 2x + 3 - 4- 2x
-x ≥ -1
x ≤ 1


5.
x + 2 > 4 + 3x
x + 2 -2 - 3x > 4 + 3x -2 - 3x
-2x > 2
x < -1


6.
10 - 2x > x + 1
10 - 2x -10 - x > x + 1 -10 - x
-3x > -9
x < 3


7.
5 - 3 ≤ 1 - x
1 - x ≥ 2
-x ≥ 1
x ≤ -1
(題目可能是 5x - 3 ≤ 1 - x 或5 - 3x ≤ 1 - x 之誤。)


8.
5x + 8 > 3
5x > -5
x > -1


9.
2 - 5x < 7
-5x < 5
x > -1


10.
4 - 2x ≤ -2
-2x ≤ -6
x ≥ 3


11.
x - 7 < 3x + 5
x - 7 +7 - 3x < 3x + 5+ 7 - 3x
-2x < 12
x > -6
2015-03-25 3:37 am
11.x-7<3+x5 ???


收錄日期: 2021-04-15 18:51:06
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150324000051KK00084

檢視 Wayback Machine 備份