Complete the 2 column proof.

Question

Given m<rst = 5x and m<uvw = 7x
<rstand <uvw are supplementary.

Prove x=15

m<rst=5x and m<uvw=7x <rst and <uvw are supplementary given

m<rst + <uvw = 180 definition of supplementary angles

5x+7x = 180 ?

12x=180 ?

x=15 ?

My answer:

1. Given.
2. Definition of Supplementary angles.
3. Substitution.
4. Addition of like terms.
5. Division property of equality.

Answer 1

You're right in my opinion.

Answer 2

side note this is third hand

5x+7x=180 A. Property of linear pair
12x=180 B. Addition property
x=15 C. Division property

Answer 3

Write the statements supported by the reasons on the right side of the two-column proof.​