
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
The marked price of a certain product is 1375 yuan and it is sold at an 80% discount, still making a profit of 100 yuan. If the cost price of the product is x yuan, determine the equation that can be established.

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