Answer:
206
Step-by-step explanation:
I put it in a calculator
 
        
                    
             
        
        
        
Check the attached file for the answer.
 
        
        
        
You times 4 by everything inside the parentheses, so the answer would be as follows. 16a + 20b - 12
        
             
        
        
        
Answer: 16 in
Explanation:
PQ/QR = PT/TS
PQ/4 = 12/3
PQ x 3 = 12 x 4 (cross multiply)
PQ x 3 = 48
PQ = 48/3
PQ = 16
        
                    
             
        
        
        
I used the substitution method and got (0,-2)