0N/C Electric Field at center of equilateral Triangle

Homework Statement

I got an answer as you can see in both pictures, but apparently it is wrong. What did I do?

The Attempt at a Solution

In this picture I found the y components of the electric field at C. Since the bottom 2 are the same i just doubled one of the electric fields. I then set it equal to the electric
field from the top to cancel out the effect from the bottom.