Appendix A - Equations and Inequalities - Page 421: 84

The equivalent interval notation is $(-3, 1)$.

$-7$ $\lt$ $2 + 3x$ $\lt$ $5$ $-7 - 2$ $\lt$ $3x$ $\lt$ $5 - 2$ $- \frac{9}{3}$ $\lt$ $x$ $\lt$ $\frac{3}{3}$ $-3$ $\lt$ $x$ $\lt$ $1$ The equivalent interval notation is $(-3, 1)$.