I have the following objective function in maple format.in solving it by optimization function I receive non-numeric solution error.also when trying to use heuristics and fsolve function I receive invalid argument error!

How can I solve the following differential equations  by using Maple functions and boundary conditions in a parametrical manner(obtaining x)?

I want to solve a system of 2 equations and 2 variables with solve functions.But,I receive invalid argument error.the problem is following:

 R11 := {(200*(-0.8e-1*t+0.8000000000e-1))/p^2-(120*(t-0.3999999999e-1*t^2+0.3010e-1*t^2.5))/p^3-25.0000*t^1.5/p^3-(46.67*(-5.760000000+6*t-.24*t^2))/p^3-(100*(0.8000000000e-1+0.50e-1*t^1.5))/p^3 = 0}