I have the following equation to solve. I have the answer, but don't know how to get to that answer. Please help:

Equation

-[3/(1/2 + x/y)] + (9y/2x) - 6 = 0

The answer is given as:

x/y = 1/2

Please help, and write out each step to getting the answer if possible. I know it's probably simple, but I'm very bad at maths.