Answer:
Option 3
Step-by-step explanation:
 
        
             
        
        
        
Answer:36 16
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
yes
Step-by-step explanation:
 
        
             
        
        
        
X+y=31.5
x-y=5.25
add 2 equations
x+y+x-y=31.5+5.25
2x=36.75
x=18.375
y=31.5-18.375=13.125
check : 18.375+13.125=31.5, 18.375-13.125=5.25 
so
Answer:
18.375 and 13.125