
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
If $3x - 4y - z = 0$ and $x + 4y - 15z = 0$ where $z \neq 0$, find the numerical value of $\frac{x^2 + 3xy - yz}{y^2 + z^2}$.
**A)** 1.5  
**B)** 2.4  
**C)** 3  
**D)** -2  
**E)** 0

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