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

Question

Aspen Edwards

26 August, 21:34

+5

Answers (2)

Know the Answer?

Yosef Haley · Answer 1

(1) distributive is the answer. Distributive property just means 4 (x-1) = 4x-4

Rodolfo Bryan · Answer 2

4 (x - 1) + 3 = 18

4 (x) - 4 (1) + 3 = 18

4x - 4 + 3 = 18

4x - 1 = 18

+ 1 + 1

4x = 19

4 4

x = 4³/₄

The answer is line 3.