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A number of methods for solving differential equations are discussed in this article along with the many fields of science and engineering that make use of them. To comprehend both naturally occurring and artificially created systems one must be familiar with differential equations which are mathematical models that depict the change of a quantity over time or space. This article will go over what a differential equation are, the various kinds of differential equations, how to solve them, the order and degree of the differential equation, and some instances of ordinary differential equations with real-world problems and a solved issue. Variable separation, integration factors, homogeneous equations and replacements, the characteristics approach, numerical methods, Laplace and Fourier transforms, and symmetry methods are the main techniques covered. Various methods are applicable to various kinds of differential equations; together they provide a toolbox full of methods for solving these problems either analytically or with reasonable approximations. Various areas rely on differential equations as shown by the highlighted applications. These include engineering, biology, economics, environmental science, technology, medicine, and physics. This study strives to provide a thorough grasp of the techniques used to solve differential equations and their significance in addressing real-world situations by giving both the theoretical foundations and practical implementations.