Question

Determinati multimea valorilor lui x pentru care -4<3x+2<4.

Answer 1

$-4\ \textless \ 3x+2\ \textless \ 4 \ \ \ |(-2) \\\\ -6\ \textless \ 3x\ \textless \ 2 \ \ \ |:3 \\\\ -2\ \textless \ x\ \textless \ \frac{2}{3} \\\\\\ \boxed{x \in (-2;\frac{2}{3})}$