Chapter 1, Equations and Inequalities - 1.7 Solve Absolute Value Equations and Inequalities - 1.7 Exercises - Skill Practice - Page 55: 21

$$d=-4\quad \mathrm{or}\quad \:d=9$$

Since the value inside the absolute value can be positive or negative and get the same number, we must consider both options. Doing this, we find: $$2d-5=-13\quad \mathrm{or}\quad \:2d-5=13\\ d=-4\quad \mathrm{or}\quad \:d=9$$