Anonymous

The current down from the top and upper left cancel with the current left. the current down at the bottom and lower right sum to 5A so the current at ? must be left toward the center 5A.

Anonymous

-2+0,866+4,0,866 +Ix = 0 Ix = 2-5*0,866 = -2.33 A

Anonymous

There are 2A entering but 7A leaving so 5A must be heading left from the right by KCL: +1+1-2-1-4 = -5 so +5A must enter from the right.