
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
Consider a sequence where each term is the sum of the two immediate preceding terms. A segment of this sequence is given as:
\[..., x, y, z, 10, 5, 15, 20, 35, 55, 90, ... \]
Find the value of $x$.
A) -25  
B) -20  
C) -15  
D) -10  
E) -5

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