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a fost răspuns

-1 < [tex] \frac{2X+5}{3} [/tex] <3

Răspuns :

[tex]\rm ^{3)}-1< \frac{2x+5}{3}<^{3)}3 \\ \\ -\frac{3}{3}< \frac{2x+5}{3}< \frac{9}{3}|\cdot 3 \\ \\ -3<2x+5<9|-5 \\ \\ -8<2x<4|:2 \\ \\ -4<x<2 \\ \\ \bold{x \in (-4;+2)}[/tex]