Given \qquad m \angle QPS = 40^\circm∠QPS=40
∘
m, angle, Q, P, S, equals, 40, degrees
\qquad m \angle RPS = 8x + 7^\circm∠RPS=8x+7
∘
m, angle, R, P, S, equals, 8, x, plus, 7, degrees
\qquad m \angle QPR = 9x + 16^\circm∠QPR=9x+16
∘
m, angle, Q, P, R, equals, 9, x, plus, 16, degrees
Find m\angle QPRm∠QPRm, angle, Q, P, R:

{}^{\circ}
∘