isaiahh223gLv4

3 May 2022

Given: m A = m B, m A = 9x - 20, and m B = 43

Prove: x = 7

 Statement:                      Reason:

1. m A = m B                  1. Given

2. m A = 9x - 20                 2 . Given

3. m B = 43                      3. Given

4. 9x - 20 = 43                    4. Substitution

5. 9x = 63                            5. [?]

6. x = 7                                6.

 

Select the reason that best supports Statement 5 in the given proof.

A. Multiplication Property of Equality

B. Subtraction Property of Equality

C. Division Property of Equality

D. Addition Property of Equality