(Please help me!!) Identify the postulate or theorem that proves r∥s. Given: ∠2≅∠4

Conv. of Alt. Ext. ∠s Thm.
Conv. of Alt. Int. ∠s Thm.
Conv. of Corr. ∠s Post.
Corr. ∠s Post.

You should look for corresponding ,alternate and co-interior

your answer would be 10x - 1

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -