
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
Two containers each contain the same number of marbles, and every marble is either red or yellow. In Container $A$ the ratio of red to yellow marbles is $7:3$, and the ratio of red to yellow marbles in Container $B$ is $4:1$. There are $120$ yellow marbles in total. Calculate the difference between the number of red marbles in Container $A$ and the number of red marbles in Container $B$.

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