
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
Zhang Chao and Wang Hai bought the same notebooks and pencils at the same stationery store. Zhang Chao bought 5 notebooks and 4 pencils, paying 20 yuan and receiving 3.5 yuan in change. Wang Hai bought 2 notebooks and 2 pencils, paying exactly 7 yuan. How much does each notebook cost?

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