For what finite value of x is the electric field zero?

[Calcguy]

Homework Statement

A charge +q is at the origin. A charge -2q is at x = 1.60 m on the +x axis.
(a) For what finite value of x is the electric field zero?

Homework Equations

The Attempt at a Solution

I got -3.2m, but its wrong.

HELP!

 

[LowlyPion]

Homework Statement

A charge +q is at the origin. A charge -2q is at x = 1.60 m on the +x axis.
(a) For what finite value of x is the electric field zero?

Homework Equations

The Attempt at a Solution

I got -3.2m, but its wrong.

HELP!

Why don't you show the equation that gave that to you? I think there is just a simple mistake.