
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
If a solution to the equation $ax-3y=0$ in terms of $x$ and $y$ is also a solution to the system of equations $\left\{\begin{array}{l}{x+y=1}\\{2x+y=0}\end{array}\right.$, then the value of $a$ is ______.

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