Given triangle A B C and a point P inside it, \angle B A P=18^{\circ}, \angle C A P=30^{\circ}, \angle A C P=48^{\circ}, and A P=B C. If \angle B C P=x^{\circ}, find x.
Given triangle A B C and a point P inside it, \angle B A P=18^{\circ}, \angle C A P=30^{\circ}, \angle A C P=48^{\circ}, and A P=B C. If \angle B C P=x^{\circ}, find x.