  Kinetic equations for the process of multiphoton bremsstrahlung of electron
in a matter have been used to derive the equations for the moments of
distributions of electrons over the number of emitted photons and over the
energy loss. The equations for the moments have been solved in continuous
slowing down approximation. It has been shown that the moments of multiphoton
distributions can be expressed in terms of the moments of macroscopic
differential cross section of the process. The results of analytical
calculations have been compared with the data of Monte Carlo simulation.
