Gedif, Tsegaye(PhD)Wana, Asfaw2018-07-112023-11-042018-07-112023-11-042017-08http://etd.aau.edu.et/handle/123456789/8045Nonlinear first order equations are typically hard to solve without some conditions placed on the PDE. In this project I used to present the Method of Characteristics and Auxiliary system of equation to solve first order nonlinear Partial Differential Equations using Lagrange’s and Charpit’s methodenFirst Order NonlinearPartial Differential EquationFirst Order Nonlinear Partial Differential Equation Lagrange Method, Char pit’s MethodThesis