(08.05)
The work of a student to solve a set of equations is shown below:

Equation 1: m = 6 + n
Equation 2: 2m = 8 + 8n

Step 1: 
−2(m) = 
−2(6 + n)
 
2m = 
8 + 8n
 
Step 2: 
−2m = 
−12 − 2n
 
2m = 
8 + 8n
 
Step 3: 
−12 − 2n = 
8 + 8n
 
Step 4: 
−20 = 
10n
 
Step 5: 
n = 
−2


In which step did the student first make an error?

Step 2
Step 3
Step 4
Step 5