Appendix A - Equations and Inequalities - Page 418: 99

$19$ $\geq$ $x$ $\gt$ $-16$ The equivalent interval notation is $(-16, 19]$.

$-3$ $\leq$ $\frac{x - 4}{-5}$ $\lt$ $4$ $-3 * -5$ $\geq$ $x - 4$ $\gt$ $4 * -5$ Inequality sign reversed because of multiplication of -5 $15 + 4$ $\geq$ $x$ $\gt$ $-20 + 4$ $19$ $\geq$ $x$ $\gt$ $-16$ The equivalent interval notation is $(-16, 19]$.