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rezolvati in z inecuatiile:
x+7<3


Răspuns :

x+7<3
x<3-7
x<-4⇒x∈[-5,-6,-7,...];
x+7<3 |-7
x<-5
x apartine {-6,-7,-8,-9.... }
Ma anunti daca nu ai inteles! :)