Question

Nathan wrote the following steps to prove the equation:
Given: 3(x + 2) = 6x + 3
Prove: x = 1

Step

Mathematical Statement

Justification

0

3(x + 2) = 6x + 3

Given

1

3x + 6 = 6x + 3

Distributive Property

2

6 = 3x + 3

Commutative Property of Addition

3

3x + 3 = 6

Symmetric Property of Equality

4

3x = 3

Subtraction Property of Equality

5

x = 1

Division Property of Equality


Which step of justification is incorrect, and what should the justification for that step be to solve the equation?

Answer 1

Step 4; Commutative Property of Multiplication

Step 3; Reflexive Property of Equality

Step 1; Associative Property of Addition

Step 2; Subtraction Property of Equality

Answer 2

Please post this in the math group. Thanks. :)