Your equations all seem way to complicated. Here's how I solved it.
Chloe's $32 is 2/3 of "what remains," because Bob took 1/3 of "what remained" + 4.
So I did 32 = 2/3x and solved for x. x = 48. So Bob got 1/3 of that, plus 4 = 20.
My brain was frozen and I panicked, as usual on this question. But when I took a deep breath, slapped myself in the face a couple of times, and then looked at it more reaonably, I saw this and it was really easy to solve. It's strange, few of these are hard to solve, it's just that the test questions and format is such that you don't see how to set it up. once you see what it's saying, they're usually rather simple.