The work of a student to solve the equation 3(2x - 4) = 8 + 2x + 6 is shown below:

Step 1: 3(2x - 4) = 8 + 2x + 6
Step 2: 5x-7 = 14 + 2x
Step 3: 5x - 2x= 14 + 7
Step 4:3x = 21
Step 5: X= 7

In which step did the student first make an error and what is the correct step? (5 points)
Step 2: 6x - 12 - 14 - 2x
Step 2: 6x - 7 = 246 + x + 4)
Step 3: 5x-2x = 14-7
Step 3: 5x + 2x = 14 + 7
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