please help me w/ this geometry question. 
image attached. 
                                             
                                          
                                          
                                        
											 
											In triangle ABC, <A + <B +<C = 180
plug in
3x + 7 + 2x - 8 + 5 - x = 180
4x + 4 = 180
4x = 176
x = 44
Answer
x = 44