
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
We mix a liquid with a density of 1.7 and a weight of 400 grams with a solution with a density of 1.2 and a weight of 600 grams. After mixing, the density of the new solution is measured to be 1.4. What is the contraction occurring when mixing the two initial liquids?

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