Answers

2014-02-10T22:29:38+08:00
3x+1<0
3x<-1
x<-1/3

1)
for x<-1/3
-(3x+1)≥5x-1
-3x-1-5x≥-1
-8x≥0  /:(-8)
x≤0
x∈(-∞,-1/3)

2)
for x≥-1/3
3x+1≥5x-1
3x-5x≥-1-1
-2x≥-2  /:(-2)
x≤1
x∈<-1/3,1>

x∈(-∞, 1>
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