Dora is writing statements as shown to prove that if segment ST is parallel to segment RQ, then x = 12. Statement Reason
1. Segment ST is parallel to segment QR Given
2. Angle QRT is congruent to angle STP Corresponding angles formed by parallel lines and their transversal are congruent
3. Angle SPT is congruent to angle QPR Reflexive property of angles
4. Triangle SPT is similar to triangle QPR Angle-Angle Similarity Postulate
5. (3x + 24):3x = Corresponding sides of similar triangles are in proportion
Which of the following can she use to complete statement 5? (1 point)

Question 3 options:

1) 85:51
2) 3x: 85
3) 3x:51
4) 34:24