
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
An alloy is composed of tin, copper, and zinc. If 20 grams of this alloy are separated and melted with 2 grams of tin, the mass of copper in the newly formed alloy will be equal to the mass of tin. If 30 grams of the original alloy are separated and 9 grams of zinc are added, the mass of tin in this new alloy will be equal to the mass of zinc. Determine the percentage composition of the original alloy.

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