
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
A certain city has adjusted the residential water price from this January, with an increase of 20% per cubic meter. Last December, Xiaoli's family paid 15 yuan for water, while this May, they paid 30 yuan. It is known that Xiaoli's family used 5 cubic meters more water this May than last December. Calculate the residential water price in the city this year.

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