In this paper by considering the standard decomposition method (in short SDM) and the modified decomposition method (in short MDM), Boussinesq like equation is solved by the authors. The method does not need linearization or weal nonlinearly assumptions. In this scheme the authors calculated solution in the form of a convergent power series with easily computable components. The decomposition series analytic solution of the problem is quickly obtained by observing the existence of the self-canceling “noise” terms where sum of components vanishes in the limit.