Oh right!, so from outer loop i would get an eqn and i1 would be 5 and i2 would be 15, ok, thanks!For me the Isc is equal to 15A. And your mesh equation are wrong (10A is not a voltage).
You completely ignored the advice I gave you here:Is my solution correct to this problem? Is value of Isc 10 jst from the ckt nw?