Fully-worked solutions to problems encountered in the bestselling differentials text Introduction to Ordinary Differential Equations, Student Solutions Manual, 4th Edition provides solutions to practice problems given in the original textbook. Aligned chapter-by-chapter with the text, each solution provides step-by-step guidance while explaining the logic behind each step in the process of solving differential equations. From first-order equations and higher-order linear differentials to constant coefficients, series solutions, systems, approximations, and more, this solutions guide clarifies increasingly complex calculus with practical, accessible instruction.