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Homework Statement:

A long straight wire lying along x axis carries current I in positive x direction.
Another long straight wire lying along y axis carries current I/3 in positive y direction.
Find points where net magnetic field is zero.
Relevant Equations:
 
Unsure about this, but here is my attempt:
B from the first wire: ##\dfrac {\mu _{0}I}{2\pi r} ##
B from the second wire: ##\dfrac {\mu _{0}I}{2\pi r} ##
Let the point be (x,y)
Can I state that: ##\dfrac {\mu _{0}I}{2\pi y}+\dfrac {\mu _{i}\left( I/3\right) }{2\pi x}=0##
Hence the magnetic field is zero whenever x= 1/3y?
Thanks
B from the first wire: ##\dfrac {\mu _{0}I}{2\pi r} ##
B from the second wire: ##\dfrac {\mu _{0}I}{2\pi r} ##
Let the point be (x,y)
Can I state that: ##\dfrac {\mu _{0}I}{2\pi y}+\dfrac {\mu _{i}\left( I/3\right) }{2\pi x}=0##
Hence the magnetic field is zero whenever x= 1/3y?
Thanks