Answer:
The answer is d
Step-by-step explanation:
simplyfied into the simpiliest form possible 
 
        
                    
             
        
        
        
Answer:
false
Step-by-step explanation:
just trust me
 
        
             
        
        
        
The image is answer.................
 
        
        
        
You’d have to try to get r on one side of the equation. 
You can do that by subtracting 12 from both sides which would make it so 
R = -9