(1)-5<2x+1<6(2)-2<1-(1/5)x<3/5

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(1)-5<2x+1<6(2)-2<1-(1/5)x<3/5(1)-5<2x+1<6(2)-2<1-(1/5)x<3/5(1)-5<2x+1<6(2)-2<1-(1/5)x<3/5-5<2x+1<6-

(1)-5<2x+1<6(2)-2<1-(1/5)x<3/5
(1)-5<2x+1<6
(2)-2<1-(1/5)x<3/5

(1)-5<2x+1<6(2)-2<1-(1/5)x<3/5
-5<2x+1<6
-6<2X<5
-3-2<1-(1/5)x<3/5
-3<-1/5*X<3/5-1
15>X>-3+5
2

-5<2x+1<6
-6<2x<5
-3<x<5/2
-2<1-(1/5)x<3/5
-3/5<(1/5)x-1<2
4/5<(1/5)x<3
4<x<15

(1)-3(2) 2

(1)-6<2x<5,-3(2)-3<-(1/5)x<-2/5,同时乘以-1,不等号变方向,3>(1/5)x>2/5,所以15>x>2

第一题
-5<2x+1<6
-6<2x<5
-3<x<5/2
第二题
-2<1-(1/5)x<3/5
-3<-(1/5)x<-(2/5)
-15<-x<-2
2<x<15

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