
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 teacher wrote an equation on the board: $4(2x-1) = 1 - 3(x+2)$. Xiao Ming immediately raised his hand, asking to solve it on the board. This is how he did it:  
$8x - 4 = 1 - 3x + 6$, ① $8x - 3x = 1 + 6 - 4$, ②  
$5x = 3$, ③ $x = \frac{5}{3}$. ④  
The teacher said: Xiao Ming did not master solving linear equations well, hence he made a mistake in his solution. Please point out in which step he made the mistake: \_\_\_\_\_\_ (fill in the number), and explain the reason. Then, carefully solve the equation yourself.

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