
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 transportation of one ton of cargo from point $M$ to point $N$ by rail costs $b$ rubles more than by water. How many tons of cargo can be transported from $M$ to $N$ by rail for the amount of $a$ rubles, if by water for the same amount, $k$ tons more can be transported than by rail?

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