七下一元一次不等式组100题.doc

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1、1.3(2x+5)<2(4x+6)2.10-4(x-3)≤2(x-2)3.3x-2(9-x)>3(7+2x)-(11-6x)4.2(3x-1)-3(4x+5)≤x-4(x-7)5.2(x-1)-x>3(x-1)-3x+56.3[y-2(y-7)]≤4y7.15-(7+5x)≤2x+(5-3x)8.2(x-4)-3<1-3(x-2)9.10.0.5x+3(1+0.2x)>0.4x-0.611.12.13.7(4-x)-2(4-3x)<-4x14.15.16.3[x-2(x-2)]>x-3(x-3)17.18.19.20.21.22.23.

2、24.25.26.27.28.29.4≤<730.2x-1≤x-5≤4-31.32.33.34.35.2x<1-x≤x+536.37.38.39.40.41.42.43.44.45.46.47.48.49.50.51.52.53.54.55.56.57.58.59.60.61.62.1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.24.25.26.27.28.29.30.31.32.33.34.35.36.37.38.答案12345678910x>x≥x<-4x≥-

3、15x>4y≥6x≥x-11121314151617181920x≥x≤9x<-y<3xx≥-y>21222324252627282930x>x>6-68-4-3x≥0无解x>6-6

4、

5、无解9192939495969798991002≤x<8-1≤x<31≤x<3-1≤x<32