以下是20道分母是小数的一元一次不等式及其解答:
1. 2x/(0.5x + 1) > 3
解:2x > 3(0.5x + 1),化简得 x > 2
2. (x - 4)/(0.3x - 1) ≤ 5
解:x - 4 ≤ 5(0.3x - 1),化简得 x ≤ 9
3. (2x - 1)/(0.2x + 3) > 4
解:2x - 1 > 4(0.2x + 3),化简得 x > -5
4. (3x + 1)/(0.4x - 2) ≤ 2
解:3x + 1 ≤ 2(0.4x - 2),化简得 x ≤ 9
5. (x + 2)/(0.1x - 1) > 3
解:x + 2 > 3(0.1x - 1),化简得 x > 11
6. (2x - 1)/(0.3x + 2) ≤ 4
解:2x - 1 ≤ 4(0.3x + 2),化简得 x ≤ 14
7. (x - 1)/(0.2x + 3) > 2
解:x - 1 > 2(0.2x + 3),化简得 x < -11
8. (3x + 4)/(0.5x - 1) ≤ 6
解:3x + 4 ≤ 6(0.5x - 1),化简得 x ≤ 14
9. (2x - 1)/(0.1x + 2) > 5
解:2x - 1 > 5(0.1x + 2),化简得 x > 9
10. (x + 1)/(0.2x - 3) ≤ 3
解:x + 1 ≤ 3(0.2x - 3),化简得 x ≤ 16
11. (3x - 2)/(0.3x + 1) > 2
解:3x - 2 > 2(0.3x + 1),化简得 x > 5
12. (x - 5)/(0.5x + 2) ≤ 1
解:x - 5 ≤ 0.5x + 2,化简得 x ≤ 7
13. (2x + 1)/(0.1x - 1) > 4
解:2x + 1 > 4(0.1x - 1),化简得 x > 3
14. (3x - 1)/(0.4x + 3) ≤ 2
解:3x - 1 ≤ 2(0.4x + 3),化简得 x ≤ 13
15. (x + 1)/(0.2x + 1) > 3
解:x + 1 > 3(0.2x + 1),化简得 x > 2
16. (2x - 1)/(0.3x - 2) ≤ 5
解:2x - 1 ≤ 5(0.3x - 2),化简得 x ≤ 11
17. (x - 2)/(0.1x + 1) > 2
解:x - 2 > 2(0.1x + 1),化简得 x > 6
18. (3x + 2)/(0.5x - 3) ≤ 4
解:3x + 2 ≤ 4(0.5x - 3),化简得 x ≤ 10
19. (2x + 1)/(0.2x + 3) > 3
解:2x + 1 > 3(0.2x + 3),化简得 x > 7
20. (x + 3)/(0.1x - 2) ≤ 5
解:x + 3 ≤ 5(0.1x - 2),化简得 x ≤ 23
以上是20道分母是小数的一元一次不等式及其解答。需要注意的是,分母是小数的不等式在求解时需要考虑分母不等于0的条件,即分母不能为
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