Solve an equation in Maple

Hi everyone,

I'm trying to solve the following eqauation but Maple gives me the answer  RootOf(m*exp(-_Z*(m-1))*d^2-`#mi("θ")`+`#mi("θ")`*_Z-theta*c*t__kj-m*eta*((-1+exp(_Z))/exp(_Z))^(m-1))  

The equation is:

solve(m*exp(-(m-1)*t__ij)*d^2-`#mi("θ",fontstyle = "normal")`+`#mi("θ",fontstyle = "normal")`*t__ij-theta*(sum(t__kj, k = 1 .. c))-m*eta*(1-1/exp(t__ij))^(m-1) = 0, t__ij)

Could you please help me??

Is there any explicit solution to this equation??

Thank you for your help