Answer:
TPR
NM
6
The triangle NKM matcheswith TPR. We also already knew KMN= PRT. Now it was just a matter of aligning the order.
If you would like just basically flip the following: PRT then TR would match with NM which is what we need.
Finding: 4x - 3= 214x - 3 + 3 = 21 + 3
Simplify: 4x= 244x/ 4= 24/ 4x = 6
Answering: x = 6