When solving for the value of x in the equation 4(x - 1) + 3 = 18,

Aaron wrote the following lines on the board.

[line 1] 4(x - 1) + 3 = 18

[line 2] 4(x - 1) = 15

[line 3] 4x - 1 = 15

[line 4] 4x = 16

[line 5] x=4

Which property was used incorrectly when going from line 2 to line 3?

(1) distributive (3) associative

(2) commutative (4) multiplicative inverse