Which line shows the first error in the solution?

6x + 4 = 3x - 8 (1)

6x - 3x + 4x = 3x - 3x - 8 (2)

3x + 4 = - 8 (3)

3x + 4 - 4 = - 8 - 4 (4)

3x = - 4 (5)

3x/3 = - 4/3 (6)

x = - 4/3 (7)

A. line 3

B. line 4

C. line 5

D. line 6

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