I need someone to explain me quickly.
If triangle KLM is congruent to NOP,find the perimeter. 
                                             
                                          
                                          
                                        
											 
											Answer:
Finding x FIRST:
2x-9 = x+5
1x-9 = 5
1x = 14
x = 14
Perimeter = Add all sides
Perimeter of KLM = 15+(2x-9)+8
= 15+(2(14)-9)+8
= 15+(28-9)+8
= 15+19+8
= 42 units