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2014-09-23T18:16:25+03:00
-4<3x+5<4

scadem 5 peste tot

-9<3x<-1
impartim la 3 peste tot
-3<x<-1/3

x∈(-3,-1/3)

1 5 1
2014-09-23T19:57:51+03:00
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