Solve a big problem

Hi,
I was trying to solve eleven equations, with eleven variables, but it
seems to be too much for Matlab. Matlab just couldn't solve it. I was
using "solve" function from Symbolic Math Toolbox.
I need one solution for each variable, but the solution can't be
negative or imaginary. I really need some help, 'cause it is also too
much equations to solve manually.

Thanks.
.