How can one half x − 5 = one third x + 6 be set up as a system of equations

For this case we have the following equation:
 (1/2) x - 5 = (1/3) x + 6
 We can rewrite the equation as a system of equations.
 We have then:
 y = (1/2) x - 5
 y = (1/3) x + 6
 
 a system of equations is
 y = (1/2) x - 5
 y = (1/3) x + 6