  We introduced a fifth-order partial differential equation as a generalization
of Hirota-Satsuma coupled with KdV system. This equation is investigated based
on tanh method. By applying the suitable independent variable in Hirota-Satsuma
equation, we can convert this partial differential equations(PDE) into ordinary
differential equations(ODE) .Solving the converted Hirota-Satsuma equation by
numerical methods we showed this equation have had soliton solution.
