
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
Given that the ratio of $5x - 6$ to $2y + 20$ is constant, and $y = 5$ when $x = 3$, then, when $y = 15$, what is $x$?
A) $\frac{7}{3}$   
B) $4$   
C) $\frac{21}{5}$   
D) $\frac{15}{4}$  
E) $5$

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