A study of classes of linear integral equations of the first kind most often met in applications. Since the general theory of integral equations of the first kind has not been formed yet, the author considers the equations whose solutions either are estimated in quadratures or can be reduced to well-investigated classes of integral equations of the second kind. In this book the theory of integral equations of the first kind is constructed by using the methods of the theory of functions both of real and complex variables. Special attention is paid to the inversion formulas of model equations...