Answer:
8°
Step-by-step explanation:
For exterior angle QRS, angles RPQ and PQR are its remote interior angles.
m<QRS = m<RPQ + m<PQR
4x - 15 = x + 1 + x - 2
2x = 14
x = 7
m<RPQ = x + 1 = 7 + 1 = 8
