
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
Given $$\overrightarrow {e_{1}}=(2,1), \overrightarrow {e_{2}}=(1,3), \overrightarrow {a}=(-1,2)$$, find the pair of real numbers $(λ_{1}, λ_{2})$ such that $\overrightarrow {a}=λ_{1} \overrightarrow {e_{1}}+λ_{2} \overrightarrow {e_{2}}$.

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