
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
For an odd function $f(x)$ defined on $R$, if for any $0 < x_{1} < x_{2}$, $\frac{{f({x_2})-f({x_1})}}{{{x_2}-{x_1}}} < 3$, and $f(3) = 9$, determine the solution set of the inequality $f(x) - 3x < 0$.

Present the answer in LaTex format: \boxed{Your answer}
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