Magnetic repulsion between 2 wires?

[taylor.simon]

Homework Statement

A wire with a weight per unit length of 0.040 N/m is suspended directly above a second wire. The top wire carries a current of 30.0 A and the bottom wire carries a current of 90.0 A. Find the distance of separation between the wires so that the top wire will be held in place by magnetic repulsion.

is this the right equation can can someone show me how to use it just leave the answer out please

Homework Equations

F1 / L = mg / L = (4pi x 10^-7) I2 / 2pi x distance )

The Attempt at a Solution

 

[tiny-tim]

hi taylor.simon!

(have a pi: π and try using the X² icon just above the Reply box )

find the magnetic force per length, then the magnetic force per mass …

that has to equal the gravitational force per mass …

what do you get? ​