hi, I have 12 equations that I want to solve, when I try to solve them using maple 12 it gives me nothing just empty [ ]  but when I remove an equation from them, maple solved the other 11 equations !!

but i want to solve the 12 equations together.  the equations are :-

exp(-z[1][1]/t[1])*(sum(p[2][j]*exp(-z[2][j]/t[j]), j = 1 .. 3))*(sum(p[3][j]*exp(-z[3][j]/t[j]), j = 1 .. 3)) = t[1](1-w)/(p[1][1]*w),