
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
In the diagram, $AB$ is parallel to $DC$, and $ACE$ is a straight line. Angles $\angle ABC = 70^\circ$ and $\angle ADC = 100^\circ$. What is the value of $x$? Construct a diagram with points \(A, B, C, D,\) and \(E\), given that $ACE$ is a straight line and $AB \parallel DC$.

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